feat: add type annotations and prevent diff on dirty buffers

[ThomasK33]

Remove .luarc.json and Improve Type Annotations

This PR removes the .luarc.json file and adds comprehensive LuaLS type annotations throughout the codebase. The changes improve code quality and maintainability by:

1. Adding proper module documentation with ---@module annotations
2. Adding detailed type definitions for configuration objects and function parameters
3. Improving function documentation with consistent ---@param and ---@return annotations
4. Fixing return type annotations to properly indicate optional values with ? suffix
5. Updating keyboard shortcut in dev-config from <leader>ab to <leader>as for adding current buffer
6. Adding dirty buffer detection to prevent diff operations on unsaved files
7. Removing the Vim meta definitions file in favor of proper inline annotations

The PR also includes a comprehensive test for the new dirty buffer detection functionality to ensure it works correctly in various scenarios.

[ThomasK33]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
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• feat: add type annotations and prevent diff on dirty buffers #104 👈 (View in Graphite)
• feat: add keep_terminal_focus option for diff views #95
• main

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