`cargo install fe`

As suggested by @micahscopes, we should publish to crates.io

That'll require replacing these git dependencies:
```
radix_immutable = { version = "0.0.1", git = "https://github.com/micahscopes/radix_immutable.git" }
pretty = { git = "https://github.com/sbillig/pretty.rs", branch = "max-width-group" }
async-lsp = { git = "https://github.com/micahscopes/async-lsp", branch = "pub-inner-type-id" }
```

Start by locating the Rust dependency declarations for radix_immutable, pretty, and async-lsp shown in the issue. Check how each dependency can be sourced from crates.io instead of the listed Git branches, then verify the project can be installed with `cargo install fe`. Done means the required dependencies resolve from crates.io and the installation succeeds.

Written by the indexing model from the issue text.