add nested entity effects+conditions (#42341)

* add nested effect

* add nested condition

* move api to the main systems and improve effect guidebook text gen

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Shared/EntityConditions/SharedEntityConditionsSystem.Nested.cs

@@ -0,0 +1,20 @@
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.EntityConditions;
+
+/// <summary>
+/// Entity condition API counterpart using <see cref="EntityConditionPrototype"/> instead of <see cref="EntityCondition"/>.
+/// </summary>
+public sealed partial class SharedEntityConditionsSystem
+{
+    [Dependency] private readonly IPrototypeManager _proto = default!;
+
+    /// <summary>
+    /// <c>TryCondition</c> overload that uses a <see cref="EntityConditionPrototype"/> instead of <see cref="EntityCondition"/>.
+    /// </summary>
+    public bool TryCondition(EntityUid target, [ForbidLiteral] ProtoId<EntityConditionPrototype> id)
+    {
+        var proto = _proto.Index(id);
+        return TryCondition(target, proto.Condition);
+    }
+}