chore(ramps-controller): fix changelog formatting

[georgeweiler]

Explanation

The CHANGELOG.md for @metamask/ramps-controller had several formatting issues that were causing CI to fail:

• Entries in an "Uncategorized" section that needed proper categorization
• Some entries referenced the wrong PR (feat(ramps): adds ramps controller with geolocation state #7316 instead of feat(ramps): rename onRamp* controller & service to ramps* #7502)
• Missing PR links on some entries
• Non-consumer facing dev entries (dev-watch.js, link-ramp-controller.js scripts) that should not be in the changelog

Additionally, the changes from #7502 rename public APIs (OnRampService → RampsService, action types, etc.) which are breaking changes. Per semver, this requires a major version bump from 1.0.0 to 2.0.0 rather than a patch release.

This PR fixes the changelog formatting and updates the version to 2.0.0 to properly reflect the breaking nature of the API changes.

References

• Related to feat(ramps): rename onRamp* controller & service to ramps* #7502

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

---

Note

Cleans up @metamask/ramps-controller CHANGELOG: removes dev-only entries, marks breaking API renames, and fixes PR references and entries.

• Changelog (packages/ramps-controller/CHANGELOG.md):
  • Mark breaking changes in Unreleased for renaming OnRampService → RampsService, OnRampEnvironment → RampsEnvironment, and action type namespace updates, with links to #7502.
  • Remove non-consumer dev entries from Added section.
  • Correct and link PR references; update Fixed entry for RampsService#getGeolocation to include #7502.

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[Gudahtt]

LGTM!