feat(lint/noUnusedPrivateClassMember): add rule (#585)

CHANGELOG.md

@@ -96,6 +96,13 @@ Read our [guidelines for writing a good changelog entry](https://github.com/biom
 - Fix [#591](https://github.com/biomejs/biome/issues/591) which made [noRedeclare](https://biomejs.dev/linter/rules/no-redeclare) report type parameters with identical names but in different method signatures. Contributed by @Conaclos
 - Support more a11y roles and fix some methods for a11y lint rules Contributed @nissy-dev
 - Fix [#609](https://github.com/biomejs/biome/issues/609) `useExhaustiveDependencies`, by removing `useContext`, `useId` and `useSyncExternalStore` from the known hooks. Contributed by @msdlisper
+- Fix `useExhaustiveDependencies`, by removing `useContext`, `useId` and `useSyncExternalStore` from the known hooks. Contributed by @msdlisper
+
+#### New features
+
+- Add [noUnusedPrivateClassMembers](https://biomejs.dev/linter/rules/no-unused-private-class-members) rule.
+  The rule disallow unused private class members.
+  Contributed by @victor-teles
 
 ### Parser
 

crates/biome_diagnostics_categories/src/categories.rs

@@ -102,6 +102,7 @@ define_categories! {
     "lint/nursery/noMisrefactoredShorthandAssign": "https://biomejs.dev/linter/rules/no-misrefactored-shorthand-assign",
     "lint/nursery/noThisInStatic": "https://biomejs.dev/linter/rules/no-this-in-static",
     "lint/nursery/noUnusedImports": "https://biomejs.dev/linter/rules/no-unused-imports",
+    "lint/nursery/noUnusedPrivateClassMembers": "https://biomejs.dev/linter/rules/no-unused-private-class-members",
     "lint/nursery/noUselessElse": "https://biomejs.dev/linter/rules/no-useless-else",
     "lint/nursery/noUselessLoneBlockStatements": "https://biomejs.dev/linter/rules/no-useless-lone-block-statements",
     "lint/nursery/useAriaActivedescendantWithTabindex": "https://biomejs.dev/linter/rules/use-aria-activedescendant-with-tabindex",