fix: Preprocess modules_dir to ensure successful module loading on Windows

[WindyValley]

Probably for consistency with vim.fn.stdpath, core.helper.path_join uses '' as the path separator on Windows. However, even on Windows, the path returned by vim.fs.find still uses /. This caused pack:load_modules_packages to error when extracting the module name from the module path. To avoid compatibility issues with other places where core.helper.path_join is used, only preprocess modules_path with vim.fs.normalize in pack:load_modules_packages.

[WindyValley]

另外，有两个地方看符号名似乎用反了

dope/lua/core/helper.lua

Lines 8 to 14 in d7ed25a

	function helper.data_path()
	local cli = require('core.cli')
	if cli.config_path then
	return cli.config_path
	end
	return vim.fn.stdpath('data')
	end

dope/lua/core/helper.lua

Lines 16 to 22 in d7ed25a

	function helper.config_path()
	local cli = require('core.cli')
	if cli.data_path then
	return cli.data_path
	end
	return vim.fn.stdpath('config')
	end

我没用dope脚本，不太确定会有什么后果