Documentation: Recommend using `pipx` or `uv`

## About
`uv tool install` is the corresponding pendant to `pipx install` today, see [blueprint](https://github.com/MeltanoLabs/meltano-map-transform?tab=readme-ov-file#installation). Please verify it works, then update the docs.

## Pitch
Use `uv` or `pipx` to install `crash` into a dedicated virtualenv, managed automatically.
```shell
# Use `uv`.
uv tool install crash

# Alternatively, use `pipx`.
pipx install crash
```

## References
- GH-443

/cc @bmunkholm

Verify that the `uv tool install crash` and `pipx install crash` commands work, using the linked installation blueprint as a reference. Update the installation documentation to recommend both options; done when the documented commands install `crash` into a managed dedicated environment.

Written by the indexing model from the issue text.