rgx-cli 0.12.0

A terminal regex tester with real-time matching, multi-engine support, and plain-English explanations
Documentation
# awesome-rust Submission (Deferred)

## Status

**Blocked**: awesome-rust requires `stars > 50 | downloads > 2000`.
- Current stars: 0
- Current crates.io downloads: 135
- Submit after HN/Reddit launch brings visibility.

## Target Section

**Text processing** section in `rust-unofficial/awesome-rust`

## Draft Entry

```
- [brevity1swos/rgx]https://github.com/brevity1swos/rgx [[rgx-cli]https://crates.io/crates/rgx-cli] - Terminal regex debugger with real-time matching, 3 engines, capture group highlighting, and plain-English explanations.
```

## Steps When Ready

1. Fork `rust-unofficial/awesome-rust`
2. Add entry to "Text processing" section (alphabetically)
3. Create PR with title "Add rgx — terminal regex debugger"