Add optional status field to plugin_library.json schema

[caterryan]

The InfluxDB 3 Explorer UI needs a way to indicate plugin maturity levels (beta, deprecated) to users browsing the plugin library.

Currently there's no mechanism for plugin authors to signal that a plugin is in beta or experimental status. Users have no visibility into which plugins are production-ready vs. still in development.

Requested capability: Allow plugin entries in plugin_library.json to specify a status that the UI can display as a badge.

---

Suggested Implementation

Add an optional status field to plugin entries:

{
  "name": "Example Plugin",
  "path": "influxdata/example/example.py",
  "status": "beta",
  ...
}

Field details:

• Name: status
• Type: string (optional)
• Values: "beta" initially; Other values can be added later.
• Default behavior: If omitted, plugin is treated as stable/production (no badge shown)

Backward compatibility: Fully compatible - existing plugins without the field continue to work unchanged.

UI behavior: The Explorer UI will display a colored badge (e.g., orange "Beta" pill) on plugin cards for plugins with a status set.