feat: sandbox list with cursor pagination (#4606)

BREAKING CHANGE: The GET /api/sandbox endpoint now returns a paginated response object with full search capabilities built in, and the legacy `/api/sandbox/paginated` endpoint is being deprecated. Additionally, all /api/workspace endpoints are being removed entirely. If you still have integrations hitting /api/workspace routes, migrate them to the corresponding /api/sandbox endpoints.

Signed-off-by: fabjanvucina <fabjanvucina@gmail.com>
Co-authored-by: MDzaja <mirkodzaja0@gmail.com>
Co-authored-by: rpavlini <rpavlinic@daytona.io>