refactor: migrate RateLimitController to @metamask/messenger

[cryptodev-2s]

Explanation

This PR migrates RateLimitController to the new @metamask/messenger message bus, as opposed to the one exported from @metamask/base-controller.

References

• Related to Implement messenger delegation #5626

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

---

Note

Migrates RateLimitController to the new @metamask/messenger API (from @metamask/base-controller), updating types/tests, metadata, and package/config files.

• RateLimitController:
  • Switch to @metamask/base-controller/next and @metamask/messenger (replace RestrictedMessenger, adjust action/event types, use messenger.registerActionHandler).
  • Rename internal name to controllerName; update metadata flag to includeInDebugSnapshot.
• Tests:
  • Rework messenger setup to use root Messenger with namespaces; update types and calls.
• Package/Config:
  • Add dependency @metamask/messenger; add TS project references to messenger.
  • Update ESLint warning thresholds for RateLimitController file.
• Changelog:
  • Note BREAKING change: controller now uses Messenger from @metamask/messenger.

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[mcmire]

LGTM!

[mcmire]

Oops, noticed one thing.

[mcmire]

LGTM!