Feature Request: Built-in script documentation

[mofazhe]

My network is sometimes not very good, the network is slow.
If you are convenient, please consider support.

[kobenguyent]

I think this #193 resolves the FR.

[flawiddsouza]

Over #193, https://docs.restfox.dev will now work offline after the first load. Meaning you don't need internet to access the documentation if you've opened it with internet even once. Hope this is okay.