feat(copilot-vim): add catppuccin integration (#1498)

Author: azdanov

lua/astrocommunity/completion/copilot-vim/init.lua

@@ -1,5 +1,15 @@
+---@type LazySpec
 return {
   "github/copilot.vim",
   cmd = "Copilot",
   event = "User AstroFile",
+  specs = {
+    {
+      "catppuccin",
+      optional = true,
+      ---@module 'catppuccin'
+      ---@type CatppuccinOptions
+      opts = { integrations = { copilot_vim = true } },
+    },
+  },
 }