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/README.md

@@ -1,5 +1,8 @@
 # glow.yazi
 
+>[!WARNING]
+>This plugin is now deprecated with the release of [Piper](https://github.com/yazi-rs/plugins/tree/main/piper.yazi#examples)
+
 Plugin for [Yazi](https://github.com/sxyazi/yazi) to preview markdown files with [glow](https://github.com/charmbracelet/glow). To install, run the below mentioned command:
 
 ```bash

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",