Enhance narrative systems with detailed implementation guides and data-driven structures

- Updated BPC_NarrativeStateSystem with a comprehensive manual implementation guide, including class setup, variable initialization, and function breakdowns.
- Expanded BPC_ObjectiveSystem documentation to include a manual implementation guide and detailed function descriptions.
- Added a manual implementation guide for BPC_DialoguePlaybackSystem, outlining class setup and function nodes.
- Introduced a manual implementation guide for BPC_DialogueChoiceSystem, detailing choice presentation and selection processes.
- Enhanced BPC_BranchingConsequenceSystem documentation with a manual implementation guide for consequence evaluation.
- Updated BPC_TrialScenarioSystem with a manual implementation guide for scenario management.
- Expanded BPC_LoreUnlockSystem documentation to include a manual implementation guide for lore entry management.
- Added a manual implementation guide for BP_NarrativeTriggerVolume, detailing trigger volume setup and action execution.
- Enhanced BPC_EndingAccumulator documentation with a manual implementation guide for ending evaluation.
- Updated BPC_HitReactionSystem with a manual implementation guide for hit reaction management.
- Added a manual implementation guide for BPC_RecoilSystem, detailing recoil application and recovery processes.
- Introduced DT_ProjectTags.csv to define gameplay tags for various systems, enhancing data-driven design capabilities.

docs/blueprints/07-narrative/67_BP_NarrativeTriggerVolume.md

@@ -156,4 +156,45 @@ A level-placed trigger volume that detects player overlap and fires narrative ac
 ### Reuse Notes
 This is the primary level-design tool for narrative gating. Designers place volumes, configure action lists, and set prerequisite flags — no blueprint editing required. Supports all narrative action types. The `CustomEvent` action type allows designers to bind custom level blueprint logic when no predefined action fits.
 
-- Renamed from `47_BPC_NarrativeTriggerVolume` to `BP_NarrativeTriggerVolume` per Master naming convention.
+- Renamed from `47_BPC_NarrativeTriggerVolume` to `BP_NarrativeTriggerVolume` per Master naming convention.
+
+---
+
+## Manual Implementation Guide
+
+### Class Setup
+1. Create Blueprint Class: Parent = `Actor`, Name = `BP_NarrativeTriggerVolume`
+2. Add `BoxComponent` as Root (name: `CollisionBox`)
+3. Set Collision Preset = `OverlapOnlyPawn`
+
+### Function Node-by-Node
+
+#### `Event ActorBeginOverlap(OtherActor)` → `void`
+```
+Step 1: If NOT bIsEnabled → Return
+Step 2: Cast OtherActor to Player Character → if fail, Return
+Step 3: Check RequiredFlags → if any missing, Return
+Step 4: Check ExclusiveFlags → if any set, Return
+Step 5: TriggerType == Once AND bHasTriggered? → Return
+Step 6: Cooldown active? → Return
+Step 7: Call ExecuteActions(TriggerActions)
+Step 8: Set bHasTriggered = true, LastTriggerTime = Now
+```
+
+#### `ExecuteActions(Actions: Array<FTriggerActionEntry>)` → `void`
+```
+ForEach Actions → Switch on ActionType:
+  SetFlag → NarrativeState.SetFlag(Tag, true)
+  PlayDialogue → DialoguePlayback.PlaySequence(Asset)
+  PlayCutscene → CutsceneBridge.PlayCutscene(Asset)
+  ActivateObjective → ObjectiveSystem.ActivateObjective(Tag)
+  StartTrial → TrialScenario.StartScenario(Asset)
+  UnlockLore → LoreUnlock.UnlockLoreByTag(Tag)
+  GrantItem → Inventory.AddItem(Asset, 1)
+```
+
+### Build Checklist
+- [ ] Create BP_NarrativeTriggerVolume with BoxComponent
+- [ ] Define ETriggerActionType enum and FTriggerActionEntry struct
+- [ ] Bind ActorBeginOverlap → check conditions → ExecuteActions
+- [ ] Test: walk into volume → dialogue plays → flag sets → one-shot prevents re-fire