feat: get account from the selected account group (optionally filtered by chain ID)

[gantunesr]

Explanation

• Adds public method setSelectedAccountByAccountId(accountId): resolve getAccountContext(accountId).groupId, throw if not found, then call #setSelectedAccountGroup(groupId).
• Register in MESSENGER_EXPOSED_METHODS, regenerate AccountTreeController-method-action-types.ts, export the action type from index.ts.

References

Fixes: https://consensyssoftware.atlassian.net/browse/MUL-1999

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