Add scripts for all the commands

1. `config.py`: Add all the commands for config, it should support local and remote embedding like ollama, openai, gemini, etc. 2. `embed.py`: Add all the commands for embedding, it should support local and remote embedding like ollama, openai, gemini, etc. 3. `search.py`: Add all the commands for search, it should support local and remote embedding like ollama, openai, gemini, etc. 4. `link.py`: Add all the commands for link, it should support local and remote embedding like ollama, openai, gem