chore: crate organization

[nabetti1720]

Description of changes

As the size of our assets has grown, in this PR we will be organizing our crates.

• Removed crates that were never referenced in the code.
• We set default-features=false for all external crates, whether they have feature flags or not, to prevent unintentional introduction of unwanted features, and honestly. We didn't have time to evaluate them one by one. :)
• llrt_crypto: Fixed some missing feature flag settings.
• llrt_os: Introduced the systems feature flag. Turning off all of the included feature flags will prevent the inclusion of the sysinfo crate.

Looking at the diff of Cargo.lock, we have made progress in removing dependencies on several crates, resulting in a 48KB reduction in size. Below is the execution result using full-sdk.

before:

% du -k ./target/aarch64-apple-darwin/release/llrt
10604   ./target/aarch64-apple-darwin/release/llrt

after:

% du -k ./target/aarch64-apple-darwin/release/llrt
10556   ./target/aarch64-apple-darwin/release/llrt

Checklist

• Created unit tests in tests/unit and/or in Rust for my feature if needed
• Ran make fix to format JS and apply Clippy auto fixes
• Made sure my code didn't add any additional warnings: make check
• Added relevant type info in types/ directory
• Updated documentation if needed (API.md/README.md/Other)

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[Sytten]

Good change, we should also do feature testing of modules to ensure they dont break and deps are correctly set.

[nabetti1720]

Good change, we should also do feature testing of modules to ensure they dont break and deps are correctly set.

Is there a good and generic way to do this?

NOTE: At least some detection was possible by running the following command locally. I'd like to make it possible.

% cargo check -p [crate_name]

[nabetti1720]

@richarddavison I've accomplished what I wanted to do with this PR.

[richarddavison]

@richarddavison I've accomplished what I wanted to do with this PR.

Currently traveling but I'll take a look ASAP! Thanks for this!

[nabetti1720]

Did you enjoy the travel? I made some tweaks, but I think I accomplished what I wanted to do with this PR. :)

[richarddavison]

Looks good! I As we are very sensitive to size it's better to opt out of features. Let me just verify lambda variant builds!