update zellij layout and fix whichkey

- alacritty: add cursor style
- nvim: fix which-key, add colorizer, add debugger, update plugins
- zellij: revamp layouts
- starship: change prompt

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>

.config/nvim/lua/custom/plugins/colorizer.lua

@@ -0,0 +1,6 @@
+return {
+  'NvChad/nvim-colorizer.lua',
+  config = function()
+    require('colorizer').setup()
+  end,
+}