release: 165.0.0

[FrederikBolding]

Release candidate for 165.0.0, includes the originMetadata feature.

---

Note

Medium Risk
Major @metamask/snaps-sdk 12.0.0 and handler signature changes for originMetadata affect integrators and keyring clients; the diff is mostly versioning and manifests rather than new runtime logic.

Overview
Release 165.0.0 packages the originMetadata work already merged on main: optional extra context about request origins alongside origin on Snap handlers and related controller/execution paths (see package changelogs for @metamask/snaps-sdk 12.0.0, @metamask/snaps-controllers 21.1.0, @metamask/snaps-execution-environments 11.3.0, @metamask/snaps-utils 12.5.0, and dependents).

This PR itself bumps the monorepo to 165.0.0, cuts version + CHANGELOG entries for the affected workspace packages, and refreshes example Snap manifests (and a few CLI/manifest tests) so platformVersion is 12.0.0 with updated bundle shasums.

^{Reviewed by Cursor Bugbot for commit 2f81864. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.59%. Comparing base (71f182e) to head (2f81864).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4094   +/-   ##
=======================================
  Coverage   98.59%   98.59%           
=======================================
  Files         429      429           
  Lines       12495    12495           
  Branches     1976     1976           
=======================================
  Hits        12320    12320           
  Misses        175      175           

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