feat: add support for setSelectedAccounts

[orestiseth]

Note

Implements setSelectedAccounts, updates cron to synchronize only selected accounts, adjusts account creation defaults, and updates tests and dependencies.

• Handlers:
  • Keyring (src/handlers/KeyringHandler.ts):
    • Add routing for KeyringRpcMethod.SetSelectedAccounts calling setSelectedAccounts.
    • New setSelectedAccounts(accounts) validates IDs and triggers fullScan on selected accounts.
    • Change createAccount default synchronize to false.
    • discoverAccounts no longer filters by transaction history (returns all discovered accounts).
  • Cron (src/handlers/CronHandler.ts):
    • Inject SnapsProvider and use getSelectedAccounts to sync only selected accounts.
    • Constructor/signature updated and wiring added in src/index.ts.
• Validation (src/handlers/validation.ts):
  • Add validateSelectedAccounts to ensure provided IDs exist; throws ValidationError.
• Use cases (src/use-cases/AccountUseCases.ts):
  • discover no longer performs fullScan.
• Tests:
  • Update unit/integration tests to mock snap_manageAccounts getSelectedAccounts, reflect new defaults, and new behaviors (CronHandler.test.ts, integration tests, KeyringHandler.test.ts, AccountUseCases.test.ts).
• Config/Deps:
  • Bump @metamask/keyring-api to ^21.1.0, @metamask/keyring-snap-sdk to ^7.1.0, @metamask/snaps-jest to ^9.4.1 (and related lockfile updates).
  • Update snap.manifest.json source shasum.

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​metamask/​keyring-snap-sdk@​6.0.0 ⏵ 7.1.0	+2		+3	-2
	@​metamask/​keyring-api@​21.1.0

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[aganglada]

Looks great to me