release: 120.0.0

[ccharly]

Note

Medium Risk
The release propagates @metamask/keyring-utils@4.0.0 (breaking API removals) and updated keyring-api/sdk across many account/keyring packages, so downstream consumers must align versions even though this PR has no runtime code changes.

Overview
Monorepo release 120.0.0 — bumps the root @metamask/accounts-monorepo version and cuts new package versions with updated CHANGELOG.md entries and package.json dependency ranges; yarn.lock is refreshed to match.

Notable published versions: @metamask/keyring-api 23.6.0, @metamask/keyring-sdk 2.3.0, @metamask/keyring-utils 4.0.0 (major), plus patch/minor bumps for @metamask/account-api, ETH keyrings (HD, money, QR, simple, Trezor, Ledger bridge), snap clients/bridge/SDK, and internal API packages.

Dependency wave: workspace packages move to @metamask/keyring-api@^23.6.0, @metamask/keyring-sdk@^2.3.0, and @metamask/keyring-utils@^4.0.0 where applicable. Changelogs document prior feature work now included in these releases (e.g. keyring state migrations in SDK 2.3.0, base32 export encoding and sensitive privateKey structs in keyring-api 23.6.0, and breaking removal of re-exported superstruct helpers in keyring-utils 4.0.0).

No application source changes appear in this diff—only versioning, changelogs, manifests, and lockfile.

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