Add coc basic config, not fully working yet

nvim-coc/lua/plugins/utility/bufdelete.lua

@@ -0,0 +1,9 @@
+return {
+    -- delete a buffer
+    'famiu/bufdelete.nvim',
+    config = function()
+        local map = vim.api.nvim_set_keymap
+        map('n', '<C-w>', '<cmd>Bdelete<CR>', { silent = true, desc = "close current buffer" })
+    end
+}
+