Viur-core

- fix: `add_or_edit` edits entries with empty skeleton (1449)

- fix: Fixes for `/_translation/dump`
- fix: Better handling of invalid blob keys in `File.download()` (1444)

- fix: General fixing and clean-up on `translate()` (1364)
- fix: don't compute a bone in a not existing relation (1443)
- fix: `NumericBone.singleValueUnserialize` is now working more stable (1442)

- chore: Remove legacy `viur-queued-tasks` code (1433)
- feat: Evaluate `x-viur-bonelist` on default `viewSkel()` (light-version) (1415)
- feat: Implement `conf.tasks_default_queues` (1434)
- feat: Implement `on_delete` hook/event for sessions (1438)
- fix: `File.onEdit()` executes "leaf"-related stuff regardless of the `skelType` (1439)
- fix: `NumericBone.singleValueUnserialize` can't handle `str` (1437)
- fix: Check in `updateRelations` if `request_data` exist (1435)
- fix: Make `skeleton.listKnownSkeletons` always sorted (1430)
- fix: Type annotation `None` now correctly supported with value-check and `"null"` (1429)
- perf: Add check to avoid redundant `ensureDerived` calls (1428)

- fix: `NumericBone` ignores precision on read & write (1425)
- fix: Hotfix for `Skeleton.write()` with wrong dbEntity (1424)

- fix: `Skeleton.write()` returns full skeleton (1421)
- fix: Hotfix for 1391: missing skeltype-check (1420)
- fix: Hotfix for decorator `skey` introduced by 1394 (1419)
- fix: Keep `None` in `BooleanBones` (1418)
- fix: Replace deprecated `ensureOwnModuleRootNode` with `rootnodeSkel` (1414)