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/Toolshed/SolutionCommand.cs

@@ -0,0 +1,49 @@
+using System.Linq;
+using Content.Server.Chemistry.EntitySystems;
+using Content.Shared.Administration;
+using Content.Shared.Chemistry.Components;
+using Robust.Shared.Toolshed;
+using Robust.Shared.Toolshed.Syntax;
+
+namespace Content.Server.Administration.Toolshed;
+
+[ToolshedCommand, AdminCommand(AdminFlags.Debug)]
+public sealed class SolutionCommand : ToolshedCommand
+{
+    private SolutionContainerSystem? _solutionContainer;
+
+    [CommandImplementation("get")]
+    public SolutionRef? Get(
+            [CommandInvocationContext] IInvocationContext ctx,
+            [PipedArgument] EntityUid input,
+            [CommandArgument] ValueRef<string> name
+        )
+    {
+        _solutionContainer ??= GetSys<SolutionContainerSystem>();
+
+        _solutionContainer.TryGetSolution(input, name.Evaluate(ctx)!, out var solution);
+
+        if (solution is not null)
+            return new SolutionRef(input, solution);
+
+        return null;
+    }
+
+    [CommandImplementation("get")]
+    public IEnumerable<SolutionRef> Get(
+        [CommandInvocationContext] IInvocationContext ctx,
+        [PipedArgument] IEnumerable<EntityUid> input,
+        [CommandArgument] ValueRef<string> name
+    )
+    {
+        return input.Select(x => Get(ctx, x, name)).Where(x => x is not null).Cast<SolutionRef>();
+    }
+}
+
+public readonly record struct SolutionRef(EntityUid Owner, Solution Solution)
+{
+    public override string ToString()
+    {
+        return $"{Owner} {Solution}";
+    }
+}