`Crypto`, `File`, and `Path`

- `Crypto`: remove `hash_file_chunks!` and use `Str` instead of tags for
algorithms due to compiler bugs.
- `File` and `Path`: add `set_len!`, `read_bytes_at!`, and
  `write_bytes_at!`.

Crypto.hash!, hash_file!, and hash_file_chunks!

Fix ROC_DOCS_URL_ROOT

Documentation and `bcrypt_hash!` now returns `Str`

`Str` is more fitting _and_ ergonomic as the hash is for sure a valid
UTF8 string and will be used as such.

Add Cmd.spawn_grouped! and Cmd.kill_grouped!

Add poll!

Try to automate bundling releases

The previous workflow only bundled .roc files without building the
platform host first. This resulted in bundles missing the required
linux-x64.rh and metadata_linux-x64.rm files.

Merge upstream (roc-lang/basic-cli)

Add Crypto

Workflows: add release bundler