feature: TreesitterContext support

[Silzinc]

Is your feature request related to a problem? Please describe.

Using https://github.com/nvim-treesitter/nvim-treesitter-context, the context title is cleared and therefore looks like regular lines of code, which is rather confusing.

Describe the solution you'd like

Set a background color for TreesitterContext, typically dark_gray.

Describe alternatives you've considered

I tried setting TreesitterContext = colors.dark_gray in the options, as well as creating an autocommand to set this on colorscheme call, but no can do.

Note that setting the hl manually in the vim cmdline during session works fine.

Additional context

No response

[cpea2506]

Currently, I have these colors in mind. How do you feel about them? The goal is to create a distinct blend between normal and transparent backgrounds.

Normal Background

Transparent Background

[Silzinc]

Thank you for considering my request! Looks pretty neat imo. I am used to having a lighter bg for TreesitterContext (looking at the normal bg case) but it would certainly make it hard to read at this point, and this seems fairly readable.

[cpea2506]

Thank you for your feedback! I've updated the colorscheme as planned. If you have any other suggestions, feel free to let me know. Sorry for the long wait! 😄