Add support for environment file generation in EnvFile struct

- Introduced new methods for writing environment files in YAML and DotEnv formats.
- Updated EnvFile struct to include a buffer for storing key-value pairs.
- Modified write_env_files function to create and write to environment files based on configuration.
- Added tests for environment file writing functionality.

.gitignore

@@ -23,4 +23,7 @@ target
 #.idea/
 
 # generated environment variables file
+.env
 .env.generated
+
+generated-config.yaml