Dynamic Root (Alternative to XPath in MNTP) (#15035)

* Temp commit.. Initial work on XPath alternative for dymamically finding start nodes

* First commit that goes all the way from ui to db for NearestAncestorOrSelf

* Added more filters + return null from controller instead of not found

* Bugfix

* rewrite query to make sqlserver happy?

* Added more tests

* clean up initial step

* Added tests and refactor

* Update endpoint to take model instead of json

* pick origin

* Use model for config instead of string

* append add filter button

* fix

* default filter

* rename json fields

* correct field names

* minor corrections

* Renaming..

* Rename endpoint

* initial work for appending query steps

* query steps ui

* more localization

* query step UI

* Use doc type keys instead of alias

* only for Documents

* change to send keys to anyOfDocTypeKeys

* Fix potential bug

* Fix when level is impossible to get

* correct prop to dynamicRoot

* noValidStartNode dialog

* custom query step

* Renaming

* Rollback unintended file change

* Fixed issue if no doc type is chosen

* Remove unintended file changes

* More unintended changes

* Renaming

* Optimizations

- IDE Recommendation for better source
- Renaming for better clarity
- Improving spacing/formatting
- Typo corrections
- Remove warnings concerning IEnumerable

* Fix failed attempt bug

---------

Co-authored-by: Niels Lyngsø <niels.lyngso@gmail.com>
Co-authored-by: Sven Geusens <sge@umbraco.dk>

src/Umbraco.Core/DynamicRoot/IDynamicRootService.cs

@@ -0,0 +1,9 @@
+namespace Umbraco.Cms.Core.DynamicRoot;
+
+/// <summary>
+/// Supports finding content roots for pickers (like MNTP) in a dynamic fashion
+/// </summary>
+public interface IDynamicRootService
+{
+    Task<IEnumerable<Guid>> GetDynamicRootsAsync(DynamicRootNodeQuery dynamicRootNodeQuery);
+}