chore: Standardise controller/service exports

[Mrtenz]

Note

Low Risk
Primarily TypeScript type/export refactors; runtime behavior should be unchanged, but downstream packages may require import/type updates due to renamed or newly exported messenger/action/event types.

Overview
Standardizes public exports across snaps-controllers by re-exporting each controller/service’s *Args, *Actions, *Events, and *Messenger types (e.g., CronjobController, SnapInsightsController, SnapInterfaceController, MultichainRoutingService, ExecutionService, SnapController).

Tightens internal messenger typing by making previously exported AllowedActions/AllowedEvents helper unions internal (renamed to local Allowed* types) and updating snaps-simulation to use the concrete *Messenger types and a strongly-typed RootControllerMessenger based on @metamask/messenger’s MessengerActions/MessengerEvents.

^{Written by Cursor Bugbot for commit e1c676d. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (controller-refactors@89b1675). Learn more about missing BASE report.

Additional details and impacted files

@@                   Coverage Diff                   @@
##             controller-refactors    #3921   +/-   ##
=======================================================
  Coverage                        ?   98.56%           
=======================================================
  Files                           ?      425           
  Lines                           ?    12313           
  Branches                        ?     1934           
=======================================================
  Hits                            ?    12136           
  Misses                          ?      177           
  Partials                        ?        0           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.