[taclane]

Adds the notifier plugin to the store as an official plugin. It lives at TrunkRecorder/trunk-plugin-notify now.

It watches what the recorder hears (signals and tones, emergencies, new talkgroups and radios) and sends a notification to Discord, Slack, ntfy, a plain JSON webhook or a command. It can send right away, when the call ends, or both, and it can attach the recording.

Two commits:

• The tone_pattern topic. Trunk Recorder Pro 0.2.10 added it, and the checker didn't know it yet, so any plugin that subscribes to it would fail --describe.
• The entry itself, made with add-release, plus a row in the README table.

Some things a reviewer might want to know:

• 0.2.1 is the first release built in the org. 0.2.0 was built while the repo was still under my account, so its build provenance points there.
• The plugin SDK it needs (0.7.0) isn't on crates.io yet, so it's built from Trunk Recorder Pro's v0.2.10 tag as a git dependency, pinned in Cargo.lock. Once the SDK is published, it'll switch to that.
• On a recorder older than 0.2.10 it still runs, but it hears no tones and has no page of its own. The README says so.
• It sends data only to the destinations you set it up with. The webhook URL is marked x-secret, and it starts fine with its default settings (no rules, no destinations).

./check passed everything here except provenance: my gh is too old for gh attestation. The release does have its attestations, and CI will verify them.