Add EnemyWatcher trait to D2k and AnnounceOnSeen to D2k units and sandworms; remove sandworm announcement on worm spawn

mods/d2k/rules/arrakis.yaml

@@ -50,4 +50,7 @@ SANDWORM:
 		Weapon: WormJaw
 	Sandworm:
 		WanderMoveRadius: 5
-	IgnoresCloak:
+	IgnoresCloak:
+	AnnounceOnSeen:
+		Notification: WormSign
+		PingRadar: True

mods/d2k/rules/defaults.yaml

@@ -50,6 +50,8 @@
 	UpgradeManager:
 	TemporaryOwnerManager:
 	MustBeDestroyed:
+	AnnounceOnSeen:
+		Notification: EnemyUnitsApproaching
 
 ^Tank:
 	AppearsOnRadar:
@@ -103,6 +105,8 @@
 	UpgradeManager:
 	TemporaryOwnerManager:
 	MustBeDestroyed:
+	AnnounceOnSeen:
+		Notification: EnemyUnitsApproaching
 
 ^Husk:
 	Health:
@@ -230,6 +234,8 @@
 		UpgradeMinEnabledLevel: 1
 	UpgradeManager:
 	MustBeDestroyed:
+	AnnounceOnSeen:
+		Notification: EnemyUnitsApproaching
 
 ^Plane:
 	AppearsOnRadar:
@@ -263,6 +269,8 @@
 		UpgradeTypes: selfheal
 		UpgradeMinEnabledLevel: 1
 	UpgradeManager:
+	AnnounceOnSeen:
+		Notification: EnemyUnitsApproaching
 
 ^Helicopter:
 	Inherits: ^Plane

mods/d2k/rules/player.yaml

@@ -72,4 +72,4 @@ Player:
 	ProvidesTechPrerequisite@all:
 		Name: Unrestricted
 		Prerequisites: techlevel.low, techlevel.medium, techlevel.high, techlevel.superweapons
-
+	EnemyWatcher: