refactor: migrate to template-based theme system, clean up old per-theme configs

- Remove per-theme app configs (alacritty, foot, ghostty, hyprland,
  hyprlock, mako, rofi, swayosd, tmux, walker, waybar, etc.) now
  handled by default/themed/ templates
- Update omarchy scripts (bg-next, list, set) for new template flow
- Update configs: bootstrap, nvim, rofi, tmux, mako
- Tweak installers (02-install-base.sh, btop, desktop, goose, nvim,
  obsidian, theme, tmux)
- Remove obsolete hyprland-rofi-* and hyprland-walker-* scripts
- Update neovim.lua across remaining themes

themes/ristretto/neovim.lua

@@ -8,18 +8,24 @@ return {
           return {
             NonText = { fg = "#948a8b" },
             MiniIconsGrey = { fg = "#948a8b" },
-	    MiniIconsRed = { fg = "#fd6883" },
-	    MiniIconsBlue = { fg = "#85dacc" },
-	    MiniIconsGreen = { fg = "#adda78" },
-	    MiniIconsYellow = { fg = "#f9cc6c" },
-	    MiniIconsOrange = { fg = "#f38d70" },
-	    MiniIconsPurple = { fg = "#a8a9eb" },
-	    MiniIconsAzure = { fg = "#a8a9eb" },
-	    MiniIconsCyan = { fg = "#85dacc" }, -- same value as MiniIconsBlue for consistency
+            MiniIconsRed = { fg = "#fd6883" },
+            MiniIconsBlue = { fg = "#85dacc" },
+            MiniIconsGreen = { fg = "#adda78" },
+            MiniIconsYellow = { fg = "#f9cc6c" },
+            MiniIconsOrange = { fg = "#f38d70" },
+            MiniIconsPurple = { fg = "#a8a9eb" },
+            MiniIconsAzure = { fg = "#a8a9eb" },
+            MiniIconsCyan = { fg = "#85dacc" }, -- same value as MiniIconsBlue for consistency
           }
         end,
       })
       vim.cmd([[colorscheme monokai-pro]])
     end,
   },
+  {
+    "LazyVim/LazyVim",
+    opts = {
+      colorscheme = "monokai-pro",
+    },
+  },
 }