feat(lint): implement useAdjacentGetterSetter rule (#5964)

Author: mdevils

.changeset/chatty-schools-win.md

@@ -0,0 +1,36 @@
+---
+"@biomejs/biome": minor
+---
+
+Added the new rule [`useAdjacentGetterSetter`](https://biomejs.dev/linter/rules/use-adjacent-getter-setter), which enforces getters and setters for the same property
+to be adjacent in class and object definitions.
+
+**Example (Invalid): Name getter and setter are not adjacent:**
+
+```js
+class User {
+  get name() { return this._name; }
+  constructor() {}
+  set name(value) { this._name = value; }
+}
+```
+
+**Example (Invalid): Getter should go before the setter.
+
+```js
+const user = {
+  set name(value) { this._name = value; },
+  get name() { return this._name; }
+};
+```
+
+**Example (Valid): Name getter and setter are adjacent:**
+
+```js
+class User {
+  get name() { return this._name; }
+  set name(value) { this._name = value; }
+  get age() { return this._age; }
+  set age(age) { this._age = age; }
+}
+```

crates/biome_cli/src/execute/migrate/eslint_any_rule_to_biome.rs

@@ -183,6 +183,7 @@ define_categories! {
     "lint/nursery/noUselessBackrefInRegex": "https://biomejs.dev/linter/rules/no-useless-backref-in-regex",
     "lint/nursery/noUselessEscapeInString": "https://biomejs.dev/linter/rules/no-useless-escape-in-string",
     "lint/nursery/noUselessUndefined": "https://biomejs.dev/linter/rules/no-useless-undefined",
+    "lint/nursery/useAdjacentGetterSetter": "https://biomejs.dev/linter/rules/use-adjacent-getter-setter",
     "lint/nursery/useBiomeSuppressionComment": "https://biomejs.dev/linter/rules/use-biome-suppression-comment",
     "lint/nursery/useConsistentObjectDefinition": "https://biomejs.dev/linter/rules/use-consistent-object-definition",
     "lint/nursery/useExhaustiveSwitchCases": "https://biomejs.dev/linter/rules/use-exhaustive-switch-cases",