Add codebuddy、 claudeInternal and codexInternal enums and configurations

[guobin211]

This pull request adds support for two new tool sources, claudeInternal and codexInternal, to the ToolSource enum in Chops/Models/ToolSource.swift. The changes ensure these new sources are fully integrated with display names, icons, colors, asset names, agent/skill paths, and installation detection logic.

Add support for claudeInternal and codexInternal tool sources:

• Added claudeInternal and codexInternal cases to the ToolSource enum, making them available throughout the app.
• Provided display names, icon names, logo asset names, and color assignments for the new tool sources to ensure consistent UI representation. [1] [2] [3] [4]
• Updated agent and skill path logic to include home directory paths for the new sources, matching the structure of existing sources. [1] [2]
• Implemented installation detection logic for claudeInternal and codexInternal by checking for specific files and CLI binaries, similar to other sources. [1] [2]