Create a sandbox. Returns the initial sandbox snapshot synchronously.

With snapshotId: 404 with code: snapshot_not_found if the snapshot does not
exist; 409 with code: snapshot_not_available if it is not available, or
code: snapshot_plan_mismatch if a runtime snapshot was requested with a
different plan.

With snapshotName: 400 with code: invalid_snapshot_name if the name is
malformed, 400 without a code if snapshotId is also set, and 404 with
code: snapshot_not_found if no available snapshot in the group has the
name. The 409 cases above apply to the resolved snapshot.

409 with code: sandbox_group_suspended if the sandbox group is suspended.

400 with code: sandbox_group_limit_reached if the owner has no default
sandbox group and is already at its sandbox group limit.

400 with code: invalid_sandbox_plan if plan is not one the API currently
accepts. The message lists the accepted plans.

400 with code: invalid_timeout_seconds if timeoutSeconds is below 0 or
above the plan's maximum: 2592000 (30 days), or 86400 (24 hours) on Hobby
workspaces.