暂存feat(maintenance): 添加维护舱及相关需求机制

为乌拉族引入了新的“机体维护”需求，通过`WULA_Maintenance_Neglect`健康状况（Hediff）体现。该状况会随时间推移而恶化，影响角色能力。

新增建筑“维护舱”（`WULA_MaintenancePod`），乌拉族成员可进入其中进行维护，以清除“维护疏忽”的负面效果。维护过程需要消耗电力和零部件，所需零部件数量与负面效果的严重程度相关。

实现了配套的自动化工作逻辑：
- 当维护需求达到阈值时，角色会自动进入维护舱。
- 当维护舱缺少零部件时，搬运工会自动为其装填。

此外，事件系统中增加了一个新的条件 `Condition_FactionExists`。

Source/WulaFallenEmpire/JobDriver_LoadComponents.cs

@@ -0,0 +1,53 @@
+using RimWorld;
+using System;
+using System.Collections.Generic;
+using Verse;
+using Verse.AI;
+
+namespace WulaFallenEmpire
+{
+    public class JobDriver_LoadComponents : JobDriver
+    {
+        private const TargetIndex PodIndex = TargetIndex.A;
+        private const TargetIndex ComponentIndex = TargetIndex.B;
+
+        protected Thing Pod => job.GetTarget(PodIndex).Thing;
+        protected Thing Component => job.GetTarget(ComponentIndex).Thing;
+
+        public override bool TryMakePreToilReservations(bool errorOnFailed)
+        {
+            if (pawn.Reserve(Pod, job, 1, -1, null, errorOnFailed))
+            {
+                return pawn.Reserve(Component, job, 1, -1, null, errorOnFailed);
+            }
+            return false;
+        }
+
+        protected override IEnumerable<Toil> MakeNewToils()
+        {
+            this.FailOnDespawnedNullOrForbidden(PodIndex);
+            this.FailOnBurningImmobile(PodIndex);
+            
+            var podComp = Pod.TryGetComp<CompMaintenancePod>();
+            this.FailOn(() => podComp == null || podComp.State != MaintenancePodState.Idle);
+
+            // Go and get the components
+            yield return Toils_Goto.GotoThing(ComponentIndex, PathEndMode.OnCell).FailOnSomeonePhysicallyInteracting(ComponentIndex);
+            yield return Toils_Haul.StartCarryThing(ComponentIndex);
+
+            // Carry them to the pod
+            yield return Toils_Goto.GotoThing(PodIndex, PathEndMode.InteractionCell);
+
+            // Load the components
+            yield return Toils_General.WaitWith(60, TargetIndex.A, true, true, false, PodIndex);
+            yield return new Toil
+            {
+                initAction = () =>
+                {
+                    podComp.AddComponents(this.GetActor().carryTracker.CarriedThing);
+                },
+                defaultCompleteMode = ToilCompleteMode.Instant
+            };
+        }
+    }
+}