refactor: init_intercepter to the checkInit method to allow range commands like scratchPad

[LintaoAmons]

Currently use closure to make each command check the init status firstly, which makes it hard to take args as a lua api

	{
		name = "Scratch",
		callback = config.initConfigInterceptor(scratch.scratch),
	},

But I want to remove the initConfigInterceptor method, instead use the same method in ScratchPad

function M.scratchPad(mode, startLine, endLine)
	if not config.checkInit() then
		config.initConfig()
	end
...

So this should just be a simple refactor~