fix(copliot): restructure copilot-cmp spec

lua/lazyvim/plugins/extras/ai/copilot.lua

@@ -58,6 +58,8 @@ return {
     end,
   },
 
+  vim.g.ai_cmp
+      and {
         -- copilot cmp source
         {
           "nvim-cmp",
@@ -65,7 +67,6 @@ return {
           dependencies = { -- this will only be evaluated if nvim-cmp is enabled
             {
               "zbirenbaum/copilot-cmp",
-        enabled = vim.g.ai_cmp, -- only enable if wanted
               opts = {},
               config = function(_, opts)
                 local copilot_cmp = require("copilot_cmp")
@@ -93,8 +94,7 @@ return {
             },
           },
         },
-
-  vim.g.ai_cmp and {
+        {
           "saghen/blink.cmp",
           optional = true,
           dependencies = { "giuxtaposition/blink-cmp-copilot" },
@@ -110,5 +110,7 @@ return {
               },
             },
           },
-  } or nil,
+        },
+      }
+    or nil,
 }