Extensibility Tracking Issue

[smolck]

List of things to expose a Lua API for (not exhaustive list):

• Statusline (see Make statusline customizable from Lua #4)
• Finder/picker (as in :Uivonim files, :Uivonim grep-word, etc.)
• LSP features (signature hint, hover, diagnostics, etc.; also provide implementation for them in runtime/lua, see Builtin LSP Support #1)
• (Floating) Markdown/HTML/image viewer (see Kitty's graphic protocol support neovim/neovim#12991)
• Action menu
• Displaying images/overlays/GIFs in certain (row, col) positions? Kind of like :Uivonim nc but for anything.
• Particle effects and/or other effects (maybe? this one isn't a strong suggestion; just an idea I've had that is probably mostly useless)
• UI font sizes, paddings (where it makes sense & if it makes sense), positioning (?), etc.
• Sending HTML over to Uivonim to be sanitized and displayed as-is (?)

Should provide generic API usable from Lua plugins (core LSP, telescope.nvim, snippets.nvim).

Start with:

• Separating UI from functionality in src/components/*.ts to reduce overlap and allow external functions to hook into the former.