Update README with VSCode extension information

[as1ndu]

Hello Shesek,

Thank you for making Minsc! I was so happy to come across your project.

I noticed Minsc did not have support for VSCode. So I started working on a VSCode extension for it. The same exact extension will also work on VSCodium and other code editors that support .vsix extension packages.

So far, I have implemented;

• Autocomplete
• Syntax highlighting
• Code snippets
• Hover messages
• and Comment toggling.

In the future I plan to implement;

• Linting (error messages & warnings),
• Analysis (computing how costly Minsc code will be in terms of transaction fees)
• and Compilation (Minsc -> miniscript -> Bitcoin Script -> Address)

Thanks, again.

• Asindu