ForAll command! (#4982)

* ForAll command!
Implements "Bad Query Language", which has a few specifiers you can use for badminning, namely:
named <regex>
prototyped <prototype name>
with <component name>
tagged <tag name>
parented_to <parent entity uid>

For example: forall prototyped MobHuman parented_to 855 do explode $WX $WY 1 1 1 1; addcomp $ID Item

* oops

* fix a silent parsing bug, make parser louder.

* cleanup

* rename shit

Content.Server/Administration/Commands/BQL/ForAllCommand.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Linq;
+using Content.Server.Commands;
+using Content.Shared.Administration;
+using Robust.Shared.Console;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+
+namespace Content.Server.Administration.Commands.BQL
+{
+    [AdminCommand(AdminFlags.Admin)]
+    public class ForAllCommand : IConsoleCommand
+    {
+        public string Command => "forall";
+        public string Description => "Runs a command over all entities with a given component";
+        public string Help => "Usage: forall <comp> <command...>";
+        public void Execute(IConsoleShell shell, string argStr, string[] args)
+        {
+            if (args.Length < 2)
+            {
+                shell.WriteLine(Help);
+                return;
+            }
+
+            var entityManager = IoCManager.Resolve<IEntityManager>();
+            var (command, entities) = BqlParser.DoEntityQuery(argStr[6..], entityManager);
+
+            foreach (var ent in entities.ToList())
+            {
+                var cmds = CommandUtils.SubstituteEntityDetails(shell, ent, command).Split(";");
+                foreach (var cmd in cmds)
+                {
+                    shell.ExecuteCommand(cmd);
+                }
+            }
+        }
+    }
+}