refactor!: Standardise ExecutionService action names and types

[Mrtenz]

This renames all ExecutionService action and event names and types to follow the Service...Action pattern used in most other services.

---

Note

Medium Risk
Breaking API/type changes to ExecutionService and its messenger actions/events may require coordinated updates across consumers; runtime logic is largely moved/renamed but touches snap execution/termination pathways.

Overview
Refactors ExecutionService to match the standard ServiceName...Action / ServiceName...Event naming pattern, including new auto-generated ExecutionService-method-action-types.ts and renamed event types (e.g. ExecutionServiceUnhandledErrorEvent, ExecutionServiceOutboundRequestEvent).

Replaces the old ExecutionService interface + AbstractExecutionService base class by making ExecutionService the abstract base class, updating all concrete implementations (iframe/offscreen/proxy/webview/node) and public exports accordingly, and adjusting tests/simulation/jest helpers to use the new types and messenger handler registration.

^{Written by Cursor Bugbot for commit deff471. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

❌ Patch coverage is 94.03974% with 9 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (controller-refactors@2b92751). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...snaps-controllers/src/services/ExecutionService.ts	93.52%	9 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                   @@
##             controller-refactors    #3916   +/-   ##
=======================================================
  Coverage                        ?   98.56%           
=======================================================
  Files                           ?      425           
  Lines                           ?    12326           
  Branches                        ?     1935           
=======================================================
  Hits                            ?    12149           
  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.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, have a team admin enable autofix in the Cursor dashboard.}

[FrederikBolding]

Is this not used in a place where a ExecutionService is expected?

[Mrtenz]

It is, but this satisfies ExecutionService.