refactor(translator, executor): remove redundant `bytes.Clone` calls for improved performance

Fixed: #140 #133 #80

rebuild branch

remove all

feat: introduce custom provider example and remove redundant debug logs

refactor: standardize constant naming and improve file-based auth handling

v6 version first commit

Update internal module imports to use `v5` package path

Add OpenAI Responses support

Refactor codebase