Support configurable locations for the config file

[everag]

I use a dotfiles repo to manage my configs, and the extension wouldn't pick up, for example, ~/dotfiles/.config/ghostty/config as the config file and enable syntax highlighting automatically.

Alternatively to making it configurable, making the .config/ghostty/config path be checked as a suffix against the currently opened file would suffice as well.

[everag]

Wait a second, this extension should do a suffix check already https://github.com/Else00/ghostty-zed-extension/blob/main/languages/ghostty/config.toml#L5

For reference, as mentioned above, my file is located at ~/dotfiles/.config/ghostty/config

[injust]

This is working as intended. Due to Zed's limitations, you need to follow https://github.com/Else00/ghostty-zed-extension/blob/main/README.md#file-detection-workaround to fully install the extension.