feature: shorthand for --with (-w) in uvx and uv tool run (#14530)

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## Summary

This is a small quality of life feature that adds a shorthand (`-w`) to
the `--with` flag for minimizing keystrokes.

Pretty minor, but I didn't see any conflicts with `-w` and thought this
could be a nice place for it.

```bash
# proposed addition (short)
uvx -w numpy ipython

# original (long)
uvx --with numpy ipython
```

## Test Plan

Added testing already in the P.R. - just copied over tests from the
`--with` flag

<!-- How was it tested? -->

docs/concepts/tools.md

@@ -200,6 +200,12 @@ The `--with` option supports package specifications, so a specific version can b
 $ uvx --with <extra-package>==<version> <tool-package>
 ```
 
+The `-w` shorthand can be used in place of the `--with` option:
+
+```console
+$ uvx -w <extra-package> <tool-package>
+```
+
 If the requested version conflicts with the requirements of the tool package, package resolution
 will fail and the command will error.