feat: add production-grade translation CLI pipeline

[HarshVz]

Summary

This PR introduces the initial release of lingodev-cli, a production-grade CLI tool for translating files using the lingo.dev SDK. It implements a full file processing pipeline with smart path handling, format preservation, and persistent configuration management.

Key Features

• Smart Path Handling: Recursively scans directories or processes single files; supports . for CWD.
• Format Preservation:
  • .md: Preserves code blocks and structure.
  • .json: Translates values only, preserving keys.
  • .txt: Translates raw text.
• Configuration Management:
  • Support for global config (~/.lingo-cli/config).
  • Local .env support.
  • New CLI commands: --set-key, --reset-key, --languages.
• Architecture: Service-based design (CLIService, ConfigService, FileScannerService, TranslationService).

Testing

• Manual testing of translation flow for .md, .json, and .txt files.
• Verified configuration priority (Env Var > Local .env > Global Config).
• Verified --set-key and --reset-key persistence.
• Verified error handling for invalid paths and missing keys.

Checklist (Must Have)

• Closes # (Insert Issue Number)
• Valid title (Conventional Commits)
• Clean code & Architecture
• Tests (Unit tests to be added in follow-up)
• Changeset (Run pnpm new from repo root)

Closes #1761

[HarshVz]

previeww.mp4