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/yazi.toml

@@ -7,6 +7,12 @@ play = [
     { run = 'open -a IINA "$@"', orphan = true, for = "unix", desc='IINA'}
 ]
 
+[image]
+renderer = "kitty"
+
+[preview]
+max_width = 1000
+max_height = 1000 
 # [mgr]
 # ratio = [2, 6, 5]  # left, center, right pane width ratios  
 
@@ -14,3 +20,4 @@ play = [
 prepend_previewers = [
   { name = "*.md", run = "glow" },
 ]
+