Add rule max-classes-per-file

Author: Shinigami92

src/rules/eslint/index.d.ts

@@ -2,6 +2,7 @@ import type { CommaDangleRule } from './comma-dangle';
 import type { CurlyRule } from './curly';
 import type { GroupedAccessorPairsRule } from './grouped-accessor-pairs';
 import type { LinebreakStyleRule } from './linebreak-style';
+import type { MaxClassesPerFileRule } from './max-classes-per-file';
 import type { NoCaseDeclarationsRule } from './no-case-declarations';
 import type { NoDebuggerRule } from './no-debugger';
 import type { QuotesRule } from './quotes';
@@ -14,6 +15,7 @@ export type EslintRules = CommaDangleRule &
   CurlyRule &
   GroupedAccessorPairsRule &
   LinebreakStyleRule &
+  MaxClassesPerFileRule &
   NoCaseDeclarationsRule &
   NoDebuggerRule &
   QuotesRule &

src/rules/eslint/max-classes-per-file.d.ts

@@ -0,0 +1,27 @@
+import type { RuleConfig } from '../rule-config';
+
+/**
+ * Options.
+ */
+export type MaxClassesPerFileOptions = [number?];
+
+/**
+ * Enforce a maximum number of classes per file.
+ *
+ * @see [max-classes-per-file](https://eslint.org/docs/rules/max-classes-per-file)
+ */
+export type MaxClassesPerFileRuleConfig = RuleConfig<MaxClassesPerFileOptions>;
+
+/**
+ * Enforce a maximum number of classes per file.
+ *
+ * @see [max-classes-per-file](https://eslint.org/docs/rules/max-classes-per-file)
+ */
+export interface MaxClassesPerFileRule {
+  /**
+   * Enforce a maximum number of classes per file.
+   *
+   * @see [max-classes-per-file](https://eslint.org/docs/rules/max-classes-per-file)
+   */
+  'max-classes-per-file': MaxClassesPerFileRuleConfig;
+}