Feat: hide blocks not challenges (#39504)

* fix: remove isHidden flag from frontmatter

* fix: add isUpcomingChange

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

* feat: hide blocks not challenges

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-an-arrays-contents-using-bracket-notation.english.md

@@ -2,7 +2,6 @@
 id: 5a661e0f1068aca922b3ef17
 title: Access an Array's Contents Using Bracket Notation
 challengeType: 1
-isHidden: false
 forumTopicId: 301149
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-property-names-with-bracket-notation.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7c367417b2b2512b1a
 title: Access Property Names with Bracket Notation
 challengeType: 1
-isHidden: false
 forumTopicId: 301150
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-to-an-array-with-push-and-unshift.english.md

@@ -2,7 +2,6 @@
 id: 587d78b2367417b2b2512b0e
 title: Add Items to an Array with push() and unshift()
 challengeType: 1
-isHidden: false
 forumTopicId: 301151
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-items-using-splice.english.md

@@ -2,7 +2,6 @@
 id: 587d78b3367417b2b2512b11
 title: Add Items Using splice()
 challengeType: 1
-isHidden: false
 forumTopicId: 301152
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7c367417b2b2512b18
 title: Add Key-Value Pairs to JavaScript Objects
 challengeType: 1
-isHidden: false
 forumTopicId: 301153
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7b367417b2b2512b14
 title: Check For The Presence of an Element With indexOf()
 challengeType: 1
-isHidden: false
 forumTopicId: 301154
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7d367417b2b2512b1c
 title: Check if an Object has a Property
 challengeType: 1
-isHidden: false
 forumTopicId: 301155
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/combine-arrays-with-the-spread-operator.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7b367417b2b2512b17
 title: Combine Arrays with the Spread Operator
 challengeType: 1
-isHidden: false
 forumTopicId: 301156
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-an-array-with-the-spread-operator.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7b367417b2b2512b13
 title: Copy an Array with the Spread Operator
 challengeType: 1
-isHidden: false
 forumTopicId: 301157
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/copy-array-items-using-slice.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7a367417b2b2512b12
 title: Copy Array Items Using slice()
 challengeType: 1
-isHidden: false
 forumTopicId: 301158
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/create-complex-multi-dimensional-arrays.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7b367417b2b2512b16
 title: Create complex multi-dimensional arrays
 challengeType: 1
-isHidden: false
 forumTopicId: 301159
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/generate-an-array-of-all-object-keys-with-object.keys.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7d367417b2b2512b1e
 title: Generate an Array of All Object Keys with Object.keys()
 challengeType: 1
-isHidden: false
 forumTopicId: 301160
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-all-an-arrays-items-using-for-loops.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7b367417b2b2512b15
 title: Iterate Through All an Array's Items Using For Loops
 challengeType: 1
-isHidden: false
 forumTopicId: 301161
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-the-keys-of-an-object-with-a-for...in-statement.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7d367417b2b2512b1d
 title: 'Iterate Through the Keys of an Object with a for...in Statement'
 challengeType: 1
-isHidden: false
 forumTopicId: 301162
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-array-stored-in-an-object.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7d367417b2b2512b1f
 title: Modify an Array Stored in an Object
 challengeType: 1
-isHidden: false
 forumTopicId: 301163
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-object-nested-within-an-object.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7c367417b2b2512b19
 title: Modify an Object Nested Within an Object
 challengeType: 1
-isHidden: false
 forumTopicId: 301164
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-from-an-array-with-pop-and-shift.english.md

@@ -2,7 +2,6 @@
 id: 587d78b2367417b2b2512b0f
 title: Remove Items from an Array with pop() and shift()
 challengeType: 1
-isHidden: false
 forumTopicId: 301165
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.english.md

@@ -2,7 +2,6 @@
 id: 587d78b2367417b2b2512b10
 title: Remove Items Using splice()
 challengeType: 1
-isHidden: false
 forumTopicId: 301166
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-an-array-to-store-a-collection-of-data.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7e367417b2b2512b20
 title: Use an Array to Store a Collection of Data
 challengeType: 1
-isHidden: false
 forumTopicId: 301167
 ---
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-the-delete-keyword-to-remove-object-properties.english.md

@@ -2,7 +2,6 @@
 id: 587d7b7c367417b2b2512b1b
 title: Use the delete Keyword to Remove Object Properties
 challengeType: 1
-isHidden: false
 forumTopicId: 301168
 ---