feat: regrow finite berry sources toward their authored cap

world/jajce/JajceWorld.tscn

@@ -490,6 +490,7 @@ position = Vector3(-8, 0, -17)
 [node name="BerryBush_01" parent="WorldObjects/ResourceNodes" instance=ExtResource("2_resource")]
 position = Vector3(-6, 0, -8)
 node_id = &"berry_bush_01"
+regrow_rate = 0.02
 safety_risk = 0.05
 comfort_distance = 18.0
 discovery_priority = 1.0
@@ -498,6 +499,7 @@ discovery_priority = 1.0
 position = Vector3(-10, 0, -4)
 node_id = &"berry_bush_02"
 initial_amount = 8.0
+regrow_rate = 0.02
 safety_risk = 0.08
 comfort_distance = 20.0
 discovery_priority = 0.5
@@ -507,6 +509,7 @@ position = Vector3(12, 0, 10)
 node_id = &"berry_patch_river_01"
 initial_amount = 6.0
 yield_per_action = 1.5
+regrow_rate = 0.02
 safety_risk = 0.18
 comfort_distance = 22.0
 discovery_priority = 0.25

world/resource_nodes/ResourceNode.gd

@@ -12,6 +12,8 @@ static var _all: Array[ResourceNode] = []
 @export var resource_id: StringName = SimulationIds.RESOURCE_FOOD
 @export var initial_amount: float = 10.0
 @export var yield_per_action: float = 2.0
+@export var max_amount: float = 0.0
+@export var regrow_rate: float = 0.0
 @export var initial_enabled: bool = true
 @export var can_npcs_use: bool = true
 @export var can_player_use: bool = true