Toolshed (#17895)

* ogh

* i should save my work

* ogh

* hhcdfhjbghshbxdfhghshc
- lots of bugs in parsing still
- invocation is a stub

* expr parsing works

* awawa

* Saving work

* Improve APIs a bit all around, add shortcuts.

* awa

* awa

* AAAAAA

* save work

* Move shit to engine

* lord

* bql is kill

* forgot the fucking bike rack

* bql is kill for real

* pjb will kill me

* aughfhbdj

* adgddf

* gdsgvfvxshngfgh

* b

* hfsjhghj

* a

* tf you mean i have to document it

* follow C# standards

* Assorted cleanup and documentation pass, minor bugfix in ValueRefParser.

* Start porting old commands, remove that pesky prefix in favor of integrating with the shell.

* bw

* Fix valueref up a bit, improve autocomplete for it.

* awa

* fix tests

* git shut up

* Arithmetic commands.

* parse improvements

* Update engine.

---------

Co-authored-by: moonheart08 <moonheart08@users.noreply.github.com>

Content.Server/Administration/Systems/AdminVerbSystem.Tools.cs

@@ -117,7 +117,7 @@ public sealed partial class AdminVerbSystem
                     Icon = new SpriteSpecifier.Texture(new("/Textures/Interface/AdminActions/rejuvenate.png")),
                     Act = () =>
                     {
-                        RejuvenateCommand.PerformRejuvenate(args.Target);
+                        _rejuvenate.PerformRejuvenate(args.Target);
                     },
                     Impact = LogImpact.Extreme,
                     Message = Loc.GetString("admin-trick-rejuvenate-description"),