Adding support for GO language

lua/custom/plugins/init.lua

@@ -2,4 +2,6 @@
 --  I promise not to create any merge conflicts in this directory :)
 --
 -- See the kickstart.nvim README for more information
-return {}
+local M = {}
+M.plugins = 'custom.plagins'
+return M

lua/custom/plugins/plagins.lua

@@ -0,0 +1,11 @@
+local plugins = {
+  {
+    'williamboman/mason.nvim',
+    opts = {
+      ensure_installed = {
+        'gopls',
+      },
+    },
+  },
+}
+return plugins