Online docs for main

[alice-i-cecile]

What problem does this solve or what need does it fill?

docs.rs doesn't provide documentation for main; which can lag behind the latest release.

This also makes it hard to show off new merged documentation improvements.

What solution would you like?

Host the latest nightly docs on bevyengine.org, rebuilt after every merged PR.

What alternative(s) have you considered?

Clone the bevy repo and use cargo doc. This can't be linked, goes stale, takes a while to build and is harder for beginners.

Additional context

Discussed in #1721 and on Discord.

[mockersf]

Why not host on GitHub pages for this repo ? That would be the simplest

[alice-i-cecile]

Why not host on GitHub pages for this repo ? That would be the simplest

I like this actually. It also makes it less discoverable for beginners, which is a benefit in this case.

[james7132]

Seems like this is resolved by #3535 and followup PRs. Closing this.