refactor: switch to catppuccin mocha across tmux and neovim

- tmux: hand-rolled catppuccin theme, three-way status bar toggle, plugin cleanup
- nvim: switch colorscheme to catppuccin-mocha, update lualine colors
- nvim: add tmuxline.vim for tmux statusline generation
- kitty: fix MesloLGS NF font typo, remove deprecated config keys

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

yazi/plugins/glow.yazi/main.lua

@@ -5,7 +5,7 @@ function M:peek(job)
 	local preview_width = 55
 
 	local child = Command("glow")
-		:args({
+		:arg({
 			"--style",
 			"dark",
 			"--width",