Add edible plant resource nodes

Docs/TechnicalDesignDocument.md

@@ -418,14 +418,17 @@ Data Assets should describe content. Server code should enforce gameplay rules.
 ### Gatherable Resources
 
 The 0.1.F resource baseline uses `AAgrarianResourceNode` for simple gatherable
-world resources. Wood, fiber, and stone each have item definitions, resource
-Blueprints, deterministic Ground Zero placements, replicated remaining harvest
-counts, and bare-hand gathering through the shared interaction path.
+world resources. Wood, fiber, stone, and edible plants each have item
+definitions or yield definitions, resource Blueprints, deterministic Ground Zero
+placements, replicated remaining harvest counts, and bare-hand gathering through
+the shared interaction path.
 
 Stone specifically is represented by `DA_Item_Stone` and
 `BP_StoneResourceNode`. Ground Zero includes stone nodes in slope, exposed
 terrain, and valley-edge positions so primitive tools, campfires, and early
 construction recipes have an in-world source instead of relying on debug grants.
+Edible plants are represented by `BP_EdiblePlantResourceNode`, which yields the
+MVP `food` item from scrub, grassland, and drainage-candidate forage patches.
 
 ### Wildlife Navigation
 

Docs/Terrain/GroundZeroResourcePass.md

@@ -8,6 +8,8 @@ height, slope, and drainage-candidate analysis.
 
 - Wood: scrub/woodland and hillside patches.
 - Fiber: grassland, scrub, and drainage-candidate areas.
+- Edible plants: coastal scrub, grassland, and drainage-candidate forage
+  patches that yield the MVP `food` item.
 - Stone: slope, exposed terrain, and valley-edge areas.
 
 Freshwater remains separate because the water-source roadmap item follows this
@@ -16,6 +18,8 @@ pass and should be implemented as its own gameplay actor/system.
 ## Implementation
 
 - Added `BP_StoneResourceNode` through `Scripts/setup_playable_blueprints.py`.
+- Added `BP_EdiblePlantResourceNode` through
+  `Scripts/setup_playable_blueprints.py`.
 - Updated `Scripts/setup_ground_zero_demo_map.py` to place deterministic Ground
   Zero resource nodes.
 - Added `Scripts/verify_ground_zero_resources.py` to validate node presence,
@@ -27,6 +31,7 @@ The map now contains:
 
 - Wood nodes: `4`
 - Fiber nodes: `5`
+- Edible plant nodes: `3`
 - Stone nodes: `4`
 
 These counts include the original demo wood and fiber nodes so the first player