Release 818.0.0

[georgeweiler]

Explanation

Release 8.1.0 ramps controller which includes Transak service for V2 native ramps flow.

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

---

Note

Low Risk
Version/changelog-only release bookkeeping; no functional code changes in this diff.

Overview
Updates the monorepo release version to 818.0.0 and bumps @metamask/ramps-controller to 8.1.0.

Finalizes the ramps-controller changelog for 8.1.0 and updates compare links (notably documenting the new widgetUrl resource state and Transak native deposit flow support).

^{Written by Cursor Bugbot for commit 5f51471. This will update automatically on new commits. Configure here.}

[cryptodev-2s]

@georgeweiler adding DO-NOT-MERGE until the previous release gets approved

[cryptodev-2s]

@georgeweiler can you in the mean time update the PR title.