Add reviewed plugin action handoffs

[blessdyb]

Summary

• add typed suggestedActions for reviewed plugin handoffs while preserving legacy guardrail/rule suggestions
• sanitize and persist reviewed guardrail, rule, mock, rewrite, and response-transform suggestions without plugin-side mutation
• route plugin suggestions through existing Flowlight editors and update plugin docs/template validation

Verification

• xcodebuild test -project Flowlight.xcodeproj -scheme Flowlight -destination 'platform=macOS' -only-testing:FlowlightTests/PluginTests CODE_SIGN_IDENTITY=- CODE_SIGN_STYLE=Manual DEVELOPMENT_TEAM= CODE_SIGN_ENTITLEMENTS=\n- xcodebuild test -project Flowlight.xcodeproj -scheme Flowlight -destination 'platform=macOS' -only-testing:FlowlightTests/LocalizationTests CODE_SIGN_IDENTITY=- CODE_SIGN_STYLE=Manual DEVELOPMENT_TEAM= CODE_SIGN_ENTITLEMENTS=\n- xcodebuild test -project Flowlight.xcodeproj -scheme Flowlight -destination 'platform=macOS' -only-testing:FlowlightTests/RewriteRuleTests CODE_SIGN_IDENTITY=- CODE_SIGN_STYLE=Manual DEVELOPMENT_TEAM= CODE_SIGN_ENTITLEMENTS=\n- mock response test classes: MockRuleMatchingTests, MockResponseBytesTests, MockGateTests, MockRuleStorageTests, MockProxyTests\n- response transform test classes: ResponseTransformRuleTests, ResponseGateTests, ResponseTransformProxyTests, ResponseTransformProvenanceTests\n- node templates/inspection-plugin/validate.js\n- python3 scripts/i18n_extract.py --check\n- python3 scripts/build_site.py\n- python3 scripts/check_site.py\n- xcodebuild -project Flowlight.xcodeproj -scheme Flowlight -derivedDataPath build CODE_SIGN_IDENTITY=- CODE_SIGN_ENTITLEMENTS= CODE_SIGN_STYLE=Manual DEVELOPMENT_TEAM= test\n- launched build/Build/Products/Debug/Flowlight.app and verified the debug process started\n\n🤖 Generated with Claude Code