[FEATURE]: Add live code editing

[MUmarShahbaz]

What would you like to be added/improved?

Hey, this is a pretty decent project you got there.
The one thing I felt missing was thee ability to modify the code live.
Basically what I mean is that you`re website allows us to modify the code while designing the profile readme instead of generating most of it and then customizing in github

Describe the solution you'd like

You could do this as follows:

• Add 2 separate tabs on the same page
• 1 tab will contain the preview of the Markdown file
• 2nd tab will contain the markdown code
• The buttons on your website will add snippets to the markdown code and the user can edit them through code to change it in ways the website can't as it is too specific
• The preview tab will generate a preview of the markdown code as is

This will increase the customization capability of your website greatly

Additional context

No response