Integrate Copilot with Blink.cmp

- Switch from copilot.vim to zbirenbaum/copilot.lua
- Add blink-cmp-copilot for completion integration
- Configure Blink to show Copilot in completion menu
- Fix plugin import issues

Testing in progress - can be reverted if needed

lua/custom/plugins/blink.lua

@@ -1,6 +1,29 @@
 return {
   'saghen/blink.cmp',
+  dependencies = {
+    "giuxtaposition/blink-cmp-copilot",
+  },
   opts = {
+    sources = {
+      default = { "lsp", "path", "copilot", "buffer" },
+      providers = {
+        copilot = {
+          name = "copilot",
+          module = "blink-cmp-copilot",
+          score_offset = 100, -- High priority to show Copilot near the top
+          async = true,
+        },
+      },
+    },
+    keymap = {
+      preset = 'default',
+      accept = '<C-y>',  -- Your preferred accept key
+    },
+    appearance = {
+      -- Show source of completion (LSP/Copilot/Buffer)
+      use_nvim_cmp_as_default = false,
+      nerd_font_variant = 'mono',
+    },
     fuzzy = {},
   },
 }

lua/custom/plugins/copilot.lua

@@ -1,14 +1,35 @@
 return {
+  -- Use copilot.lua for API access (no UI)
   {
-    'github/copilot.vim',
-    event = 'VimEnter',
+    "zbirenbaum/copilot.lua",
+    cmd = "Copilot",
+    event = "InsertEnter",
     config = function()
-      -- Accept suggestion with Ctrl-y
-      vim.keymap.set('i', '<C-y>', 'copilot#Accept("\\<CR>")', {
-        expr = true,
-        replace_keycodes = false
+      require("copilot").setup({
+        suggestion = { enabled = false }, -- Disable inline ghost text
+        panel = { enabled = false },      -- Disable suggestion panel
+        filetypes = {
+          yaml = false,
+          markdown = false,
+          help = false,
+          gitcommit = false,
+          gitrebase = false,
+          hgcommit = false,
+          svn = false,
+          cvs = false,
+          ["."] = false,
+        },
+        copilot_node_command = 'node', -- Node.js version must be > 18.x
+        server_opts_overrides = {},
       })
-      vim.g.copilot_no_tab_map = true
     end,
   },
+  
+  -- Bridge between copilot.lua and blink.cmp
+  {
+    "giuxtaposition/blink-cmp-copilot",
+    dependencies = {
+      "zbirenbaum/copilot.lua",
+    },
+  },
 }