Add Github copilot

lua/custom/plugins/copilot.lua

@@ -0,0 +1,19 @@
+-- Copilot
+
+return {
+  {
+    "github/copilot.vim",
+    cmd = "Copilot",
+    event = "InsertEnter",
+    config = function()
+      -- Optional: enable copilot globally
+      vim.g.copilot_no_tab_map = true
+      vim.api.nvim_set_keymap("i", "<C-J>", 'copilot#Accept("<CR>")', { silent = true, expr = true })
+      vim.g.copilot_assume_mapped = true
+      vim.g.copilot_filetypes = {
+        ["*"] = true, -- enable for all filetypes
+        ["markdown"] = false, -- disable for markdown if desired
+      }
+    end,
+  },
+}