add: quiz and exercises to pointers

26-pointers/exercises/README.md

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+# Pointer Exercises
+
+1. **[Basics](https://github.com/inancgumus/learngo/tree/master/26-pointers/exercises/01-basics)**
+
+    Warm-up and solidify your knowledge of pointers with the basic exercises. This exercise contains 10+ mini exercises in itself.
+
+2. **[Swap](https://github.com/inancgumus/learngo/tree/master/26-pointers/exercises/02-swap)**
+
+    Using funcs, swap the values through pointers, and swap the addresses of pointers. It may be tricky than it sounds.
+
+3. **[Fix the Crash](https://github.com/inancgumus/learngo/tree/master/26-pointers/exercises/03-fix-the-crash)**
+
+    Fix the crashing program. Another tricky exercise.
+
+4. **[Simplify](https://github.com/inancgumus/learngo/tree/master/26-pointers/exercises/04-simplify)**
+
+    Simplify the given code using your knowledge of map, slices, and pointers.
+
+5. **[Rewrite the Log Parser program using pointers](https://github.com/inancgumus/learngo/tree/master/26-pointers/exercises/05-log-parser)**
+
+    You've watched the lecture. Now, try to rewrite the same log parser program using pointers on your own.