* Add show/hide cost price & profit feature
* .env should be ignored.
* js code formatted. .vscode folder ignore for vscode user settings.json
* style is replaced with bootstrap class, formatted and .env.example
* toggle button on table to like in other
* comment corrected.
* class re-factored
* minor refactor
* formatted with 4 space
---------
Co-authored-by: Lotussoft Youngtech <lotussoftyoungtech@gmail.com>
