add config and meta for diagnstic module

lua/LspUI/_meta.lua

@@ -14,7 +14,12 @@
 --- @field command_enable boolean whether enable command for `lightbulb`
 --- @field key_binding { exec: string, prev: string, next: string, quit: string } keybind for `code_action`
 
+--- @class LspUI_diagnostic
+--- @field enable boolean whether enable `diagnostic` module
+--- @field command_enable boolean whether enable command for `diagnostic`
+
 --- @class LspUI_config config for LspUI
 --- @field rename LspUI_rename_config `rename` module
 --- @field lightbulb LspUI_lightbulb_config `lightbulb` module
 --- @field code_action LspUI_code_action_config `code_action` module
+--- @field diagnostic LspUI_diagnostic `diagnostic` module

lua/LspUI/command.lua

@@ -60,7 +60,7 @@ end
 -- this function register command
 --- @param command_key string
 --- @param run function
---- @param args table
+--- @param args string[]
 M.register_command = function(command_key, run, args)
 	command_store[command_key] = command_store[command_key] or {}
 	command_store[command_key].run = run

lua/LspUI/config.lua

@@ -31,12 +31,19 @@ local default_code_action_config = {
 	},
 }
 
+--- @type LspUI_diagnostic
+local default_diagnostic = {
+	enable = true,
+	command_enable = true,
+}
+
 -- default config
 --- @type LspUI_config
 local default_config = {
 	rename = default_rename_config,
 	lightbulb = default_lightbulb_config,
 	code_action = default_code_action_config,
+	diagnostic = default_diagnostic,
 }
 
 -- Prevent plugins from being initialized multiple times

lua/LspUI/diagnostic/init.lua

@@ -0,0 +1,26 @@
+local config = require("LspUI.config")
+local M = {}
+
+-- whether this module has initialized
+local is_initialized = false
+
+-- init for diagnostic
+M.init = function()
+	if not config.options.diagnostic.enable then
+		return
+	end
+	if is_initialized then
+		return
+	end
+
+	is_initialized = true
+end
+
+--- @param arg "next"|"prev"
+M.run = function(arg)
+	if not config.options.diagnostic.enable then
+		return
+	end
+end
+
+return M

lua/LspUI/diagnostic/util.lua

@@ -0,0 +1,3 @@
+local M = {}
+
+return M