update from pinned nightly rustc to unpinned stable

[dimitrilw]

• switch rust-toolchain from pinned nightly to unpinned stable
• remove nightly features from lib.rs
• drain_filter: use vec.retain in place of nightly drain_filter feature
• variant_count:
  • add variant_count crate to Cargo.toml
  • use variant_count::VariantCount in place of nightly feature

Also:

• add to gitignore: vscode, trunk, MacOS
• one typo fix: "Gallery" -> "Galley"
• edited readme
  • add language notations to all code-blocks
  • consistent capitalization
  • a few typo fixes
  • update nvm version reference
  • other minor edits

Code compiles & passes tests.

[avacore1337]

Wow, nice work. Glad to see that you got rid of all the nightly stuff

[dimitrilw]

Thank you. 😊

I'm really green with Rust, so I am 100% positive that I'll make a lot of mistakes along the way. For all I know, the changes I made might alter our benchmark performance -- I haven't done any benchmarking -- or some other negative side-effect. But it felt good to make those changes. 😄

Thank you for the positive feedback.

[avacore1337]

The rust code is crazy efficient (but only in release mode) so not too worried about performance there. I tried two different serialization strategies, but they were about the same. Only note though regarding performance is that if the code uses less than 1% of a core when the page is in the background you won't be throttled in the same way. Really important to make the game run well for something like an idle game.
Btw, if you really wanna give this a go and contribute, I'll try to write down something regarding some of my design choices, just so you have a reference.

[avacore1337]

You should also know I have a vue3 game also that I worked on after this:
https://github.com/avacore1337/tower-idle
Didn't get as far with content there though, but it is typescript which is good if you like that. It also has a newer toolchain for javascript since I started on that later.

[dimitrilw]

I really appreciate all the thoughts you have. Thank you. Just eager to learn and improve.