Added dr plugin version

[carsongee]

RATIONALE

Plugins always have a version in their manifest, but we don't have a way to output them. This adds that

CHANGES

• Creates dr plugin version <plugin> command that returns the current version.
• Improved plugin pathing to deduplicate paths so duplicate plugin warnings are real
• Refactored GetPlugins to use a cache and return a warnings struct along with the plugin struct for the caller to decide if warnings should be displayed and for which plugins

---

Note

Low Risk
Read-only CLI and isolated plugin lookup; no changes to install/auth or data handling.

Overview
Adds dr plugin version <plugin-name> so users can read a plugin’s manifest version without listing every plugin.

Resolution uses a new FindPlugin helper that follows the same priority as full discovery (managed dirs → project-local → PATH) but only touches the requested name, avoiding unrelated PATH scans and duplicate-name warnings from DiscoverPluginsWithContext.

Output is the version string by default, a message when the manifest has no version, or JSON via --output-format json. Telemetry records the plugin name. Unit tests cover FindPlugin and the not-found CLI path.

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^{Reviewed by Cursor Bugbot for commit 96ad6e3. Configure here.}

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Code Ownership

Cli Maintainers

• cmd/plugin/cmd.go
• cmd/plugin/discovery.go
• cmd/plugin/list/cmd.go
• cmd/plugin/version/cmd.go
• cmd/plugin/version/cmd_test.go
• internal/plugin/discover.go
• internal/plugin/discover_test.go
• internal/plugin/types.go

Review requested from the teams above. Labels will be removed automatically upon approval.