feat: support config .cts extension (#3461)

Author: MohamedLamineAllal

@commitlint/load/src/utils/load-config.ts

@@ -29,10 +29,13 @@ export async function loadConfig(
 
 			// files supported by TypescriptLoader
 			`.${moduleName}rc.ts`,
+			`.${moduleName}rc.cts`,
 			`${moduleName}.config.ts`,
+			`${moduleName}.config.cts`,
 		],
 		loaders: {
 			'.ts': TypeScriptLoader(),
+			'.cts': TypeScriptLoader(),
 		},
 	});
 

README.md

@@ -135,9 +135,11 @@ Check the [husky documentation](https://typicode.github.io/husky/#/?id=manual) o
   - `.commitlintrc.js`
   - `.commitlintrc.cjs`
   - `.commitlintrc.ts`
+  - `.commitlintrc.cts`
   - `commitlint.config.js`
   - `commitlint.config.cjs`
   - `commitlint.config.ts`
+  - `commitlint.config.cts`
   - `commitlint` field in `package.json`
 - Packages: [cli](./@commitlint/cli), [core](./@commitlint/core)
 - See [Rules](./docs/reference-rules.md) for a complete list of possible rules