refactor(config): change way how it handles options

lua/gopher/config.lua

@@ -1,33 +1,27 @@
----@class Config
+---@class gopher.Config
----@field commands ConfigCommands
+local config = {}
 
----@class ConfigCommands
+---@class gopher.Config
----@field go string
+---@field commands gopher.ConfigCommands
----@field gomodifytags string
+local default_config = {
----@field gotests string
+  ---@class gopher.ConfigCommands
----@field impl string
+  commands = {
----@field iferr string
+    go = "go",
----@field dlv string
+    gomodifytags = "gomodifytags",
-
+    gotests = "gotests",
-local M = {
+    impl = "impl",
-  ---@type Config
+    iferr = "iferr",
-  config = {
+    dlv = "dlv",
-    ---set custom commands for tools
-    commands = {
-      go = "go",
-      gomodifytags = "gomodifytags",
-      gotests = "gotests",
-      impl = "impl",
-      iferr = "iferr",
-      dlv = "dlv",
-    },
   },
 }
 
----Plugin setup function
+---@param user_config gopher.Config|nil
----@param opts Config user config
+function config.setup(user_config)
-function M.setup(opts)
+  config = vim.tbl_deep_extend("force", {}, default_config, user_config or {})
-  M.config = vim.tbl_deep_extend("force", M.config, opts or {})
 end
 
-return M
+-- setup ifself, needs for ability to get
+-- default config without calling .setup()
+config.setup()
+
+return config