feat(tools): remove eslint-plugin-prettier for prettier (#42438)

* feat: remove eslint-plugin-prettier for prettier

This removes the annoying lint warnings when all that needs to change is
formatting

* fix: use .js lint-staged config to ignore properly

* fix: lint everything if a lot of files are changed

It's faster than making lots of individual linter calls

* chore: apply prettier

* fix: ignore code in curriculum-file-structure

tools/contributor/lib/utils/save-to-file.js

@@ -1,7 +1,7 @@
 const fs = require('fs');
 
 const saveToFile = (fileName, data) => {
-  fs.writeFileSync(fileName, data, err => {
+  fs.writeFileSync(fileName, data, (err) => {
     if (err) {
       return console.log(err);
     }