don't hardcode custom prerequisites anymore

to make those strings translatable

mods/cnc/rules/structures.yaml

@@ -734,3 +734,19 @@ ATWR:
 	DetectCloaked:
 		Range: 6
 	RenderRangeCircle:
+
+# custom prerequisites:
+BARRACKS:
+	Tooltip:
+		Name: Infantry Production
+		Description: Infantry Production
+
+VEHICLEPRODUCTION:
+	Tooltip:
+		Name: Vehicle Production
+		Description: Vehicle Production
+
+ANYPOWER:
+	Tooltip:
+		Name: Power Plant
+		Description: Power Plant