chore: Update RampsController to expose all methods through messenger

[Mrtenz]

Explanation

This updates the RampsController to expose all methods through the messenger in a standardised way.

References

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
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Low Risk
Mostly additive, type-only changes plus changelog updates; low risk aside from potential downstream TypeScript type/export or build issues if consumers rely on these new action types.

Overview
Adds a new auto-generated RampsController messenger action type surface. Introduces RampsController-method-action-types.ts, defining action types (and a RampsControllerMethodActions union) that map RampsController:* action names to their corresponding RampsController method handlers, including Transak-specific methods.

Updates the ramps-controller changelog to document that all public RampsController methods are now exposed via the messenger and that the corresponding action types are exported.

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[mcmire]

LGTM.

(Noticed one more thing above)