Update hecs to upstream 0.7

[Plecra]

Status

• Ready
• Development
• Hold

Description

I have bumped the hecs version to 0.7, and removed the dependency on the git version.

This mostly involved small changes to compensate for Entity::from_bits being fallible now. The biggest change was reimplementing the DynamicQuery logic (from feather-rs/feather-hecs@87d8d00) in-tree.

The new implementation should behave identically to the old code, with a couple small optimizations. There is room for more optimization too :) This is the change that I hope someone can fully review

Related issues

Checklist

• Ran cargo fmt, cargo clippy --all-targets, cargo build --release and cargo test and fixed any generated errors!
• Removed unnecessary commented out code
• Used specific traces (if you trace actions please specify the cause i.e. the player)

Note: if you locally don't get any errors, but GitHub Actions fails (especially at clippy) you might want to check your rust toolchain version. You can then feel free to fix these warnings/errors in your PR.