Add explanatory comments to ESLint rules in .eslintrc.json

I added comments to explain what some of the main ESLint rules do. This should make it easier for others to understand the setup and keep things consistent.

.eslintrc.json

@@ -9,16 +9,19 @@
   ],
   "env": { "node": true },
   "rules": {
+    // Ensures array methods like .map() and .forEach() have return statements
     "array-callback-return": [
       2,
       {
         "allowImplicit": true
       }
     ],
+    // Disallows `if` statements as the only statement in an `else` block
     "no-lonely-if": 2,
     "no-proto": 2,
     "eqeqeq": [2, "smart"],
     "no-caller": 2,
+    // Encourages dot notation instead of brackets for property access
     "dot-notation": 2,
     "no-var": 2,
     "prefer-const": 2,
@@ -28,10 +31,13 @@
     "prefer-template": 2,
     "one-var": [2, "never"],
     "prefer-destructuring": [2, { "object": true }],
+    // Ensures comments start with a capital letter
     "capitalized-comments": 2,
+    // Enforces a consistent style for multiline comments
     "multiline-comment-style": [2, "starred-block"],
     "spaced-comment": 2,
     "yoda": [2, "never"],
+    // Requires curly braces for multi-line control statements
     "curly": [2, "multi-line"],
 
     "no-else-return": [