Decrease WASM build size

[lgarron]

The current size (1.4MB) comes from a few things.

• Way more of the codebase being included than necessary (including the entire web server?)
  • Note that package.metadata.wasm-pack.lib is currently being ignored (it might need to go into the workspace Cargo.toml) and has the wrong path, but I haven't been able to fix this even by specifying the WASM entry as the main lib path.
• Use of the standard library without tree shaking (https://doc.rust-lang.org/cargo/reference/unstable.html#build-std)
• Large .text section?
• Embedded symbols?

Potentially useful command:

rustup component add rust-src --toolchain nightly
cargo install cargo-bloat

cargo +nightly bloat --release -Z build-std --target aarch64-apple-darwin -n 1000

Also:

• https://rustwasm.github.io/docs/book/reference/code-size.html

[lgarron]

This is now significantly better. It was down to ≈240KiB, but is back up to ≈310KiB due to big cube definitions.

I was to change the WASM build to get the KPuzzleDefinition JSON from JS instead of embedding it, which should allow us to get back down in size.