chore: add more ESLint plugins (#78)

Author: JoshuaKGoldberg

.eslintrc.cjs

@@ -1,6 +1,16 @@
 module.exports = {
-	extends: ["eslint:recommended", "prettier"],
+	extends: [
+		"eslint:recommended",
+		"plugin:eslint-comments/recommended",
+		"plugin:regexp/recommended",
+		"prettier",
+	],
 	overrides: [
+		{
+			extends: ["plugin:markdown/recommended"],
+			files: ["**/*.{md}"],
+			processor: "markdown/markdown",
+		},
 		{
 			extends: [
 				"plugin:@typescript-eslint/recommended",
@@ -31,9 +41,19 @@ module.exports = {
 		tsconfigRootDir: __dirname,
 		project: ["./tsconfig.json"],
 	},
-	plugins: ["@typescript-eslint", "simple-import-sort", "typescript-sort-keys"],
+	plugins: [
+		"@typescript-eslint",
+		"deprecation",
+		"no-only-tests",
+		"regexp",
+		"simple-import-sort",
+		"typescript-sort-keys",
+		"vitest",
+	],
 	root: true,
 	rules: {
+		"deprecation/deprecation": "error",
+		"no-only-tests/no-only-tests": "error",
 		"simple-import-sort/exports": "error",
 		"simple-import-sort/imports": "error",
 	},

package.json

@@ -13,9 +13,15 @@
 		"cspell": "^6.12.0",
 		"eslint": "^8.24.0",
 		"eslint-config-prettier": "^8.5.0",
+		"eslint-plugin-deprecation": "^1.3.3",
+		"eslint-plugin-eslint-comments": "^3.2.0",
 		"eslint-plugin-jsonc": "^2.4.0",
+		"eslint-plugin-markdown": "^3.0.0",
+		"eslint-plugin-no-only-tests": "^3.1.0",
+		"eslint-plugin-regexp": "^1.11.0",
 		"eslint-plugin-simple-import-sort": "^8.0.0",
 		"eslint-plugin-typescript-sort-keys": "^2.1.0",
+		"eslint-plugin-vitest": "^0.0.20",
 		"husky": ">=6",
 		"jsonc-eslint-parser": "^2.1.0",
 		"lint-staged": ">=10",