adds go config and removes unnecessary packages

modules/nvim/config/lua/plugins/gopher.lua

@@ -0,0 +1,15 @@
+return {
+  "olexsmir/gopher.nvim",
+  ft = "go",
+  build = function()
+    vim.cmd.GoInstallDeps()
+  end,
+  ---@module "gopher"
+  ---@type gopher.Config
+  opts = {},
+  keys = {
+    { "<leader>cga", "<cmd>GoTagAdd<cr>", desc = "Add tags to struct", mode = "n" },
+    { "<leader>cgi", "<cmd>GoIfErr<cr>", desc = "Adds if err boilerplate", mode = "n" },
+    { "<leader>cgt", "<cmd>GoTestAdd<cr>", desc = "Add test under cursor", mode = "n" },
+  },
+}