fix: allow any type for meta.docs.recommended in custom rules (#19995)

Author: fasttime

docs/src/extend/custom-rules.md

@@ -50,7 +50,7 @@ The source file for a rule exports an object with the following properties. Both
 - `docs`: (`object`) Properties often used for documentation generation and tooling. Required for core rules and optional for custom rules. Custom rules can include additional properties here as needed.
 
     - `description`: (`string`) Provides a short description of the rule. For core rules, this is used in [rules index](../rules/).
-    - `recommended`: (`boolean`) For core rules, this specifies whether the rule is enabled by the `recommended` config from `@eslint/js`.
+    - `recommended`: (`unknown`) For core rules, this is a boolean value specifying whether the rule is enabled by the `recommended` config from `@eslint/js`.
     - `url`: (`string`) Specifies the URL at which the full documentation can be accessed. Code editors often use this to provide a helpful link on highlighted rule violations.
 
 - `fixable`: (`string`) Either `"code"` or `"whitespace"` if the `--fix` option on the [command line](../use/command-line-interface#--fix) automatically fixes problems reported by the rule.

package.json

@@ -107,11 +107,11 @@
     "@eslint-community/eslint-utils": "^4.2.0",
     "@eslint-community/regexpp": "^4.12.1",
     "@eslint/config-array": "^0.21.0",
-    "@eslint/config-helpers": "^0.3.0",
-    "@eslint/core": "^0.15.0",
+    "@eslint/config-helpers": "^0.3.1",
+    "@eslint/core": "^0.15.2",
     "@eslint/eslintrc": "^3.3.1",
     "@eslint/js": "9.32.0",
-    "@eslint/plugin-kit": "^0.3.4",
+    "@eslint/plugin-kit": "^0.3.5",
     "@humanfs/node": "^0.16.6",
     "@humanwhocodes/module-importer": "^1.0.1",
     "@humanwhocodes/retry": "^0.4.2",

tests/lib/types/types.test.ts

@@ -897,6 +897,21 @@ type DeprecatedRuleContextKeys =
 	},
 });
 
+// `meta.docs.recommended` can be any type
+(): JSRuleDefinition => ({
+	create() {
+		return {};
+	},
+	meta: {
+		docs: {
+			recommended: {
+				severity: "warn",
+				options: ["never"],
+			},
+		},
+	},
+});
+
 // #endregion
 
 // #region Linter