chore(release): 4.0.0 [skip ci]

# [4.0.0](v3.0.0...v4.0.0) (2025-01-14)

### Bug Fixes

* correct typo in README and ensure async key import handling ([377cc34](377cc34))

### Code Refactoring

* **error:** implement consistent error handling system ([8857fde](8857fde))

### Features

* add input validation for key import ([e6aa7a9](e6aa7a9))

### BREAKING CHANGES

* **error:** GitKeyKitCodes enum changed to string literals

- Replace numeric error codes with string literals for better debugging
- Implement consistent error handling across all modules
- Add proper error propagation chain
- Improve error messages and debugging information
- Add detailed error logging
- Centralize error handling in CLI layer

Author: semantic-release-bot

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gitkeykit",
-  "version": "4.0.0-next.1",
+  "version": "4.0.0",
   "description": "Setup pgp keys and sign commits with ease on Linux and Windows machines.",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",