Change copilot & dap config

Move them to plugin
1. dap need to be loaded before it is configured
2. Copilot command is missing, so we use canonical setup

lua/config/options.lua

@@ -6,24 +6,5 @@ if vim.fn.has("gui_running") == 1 then
   vim.o.clipboard = ""
 end
 vim.g.copilot_no_tab_map = true
-vim.api.nvim_set_keymap("i", "<C-Tab>", 'copilot#Accept("<CR>")', { silent = true, expr = true })
 vim.o.guifont = "Monaco:h16"
 vim.cmd("set wrap")
-local dap = require("dap")
-dap.adapters.python = {
-  type = "executable",
-  command = "python",
-  args = { "-m", "debugpy.adapter" },
-}
-
-dap.configurations.python = {
-  {
-    type = "python",
-    request = "launch",
-    name = "Launch file",
-    program = "${file}",
-    pythonPath = function()
-      return "python"
-    end,
-  },
-}

lua/plugins/example.lua

@@ -14,6 +14,29 @@ return {
       kind_filter = { tex = true },
     },
   },
+  {
+    "mfussenegger/nvim-dap",
+    config = function()
+      local dap = require("dap")
+      dap.adapters.python = {
+        type = "executable",
+        command = "python",
+        args = { "-m", "debugpy.adapter" },
+      }
+
+      dap.configurations.python = {
+        {
+          type = "python",
+          request = "launch",
+          name = "Launch file",
+          program = "${file}",
+          pythonPath = function()
+            return "python"
+          end,
+        },
+      }
+    end,
+  },
   {
     "tomasr/molokai", -- colorscheme
     -- config = function()
@@ -225,6 +248,9 @@ return {
         markdown = true,
         help = true,
       },
+      keymap = {
+        accept = "<C-Tab>",
+      },
     },
   },
   {