add units in config files

src/lib/config/WorldConfig.h

@@ -5,23 +5,23 @@
 // Region widths are in tiles (REQ-GW-REGIONS).
 struct WorldRegions
 {
-    int asteroidWidth;
-    int playerBufferWidth;
-    int contestZoneWidth;
-    int enemyBufferWidth;
+    int asteroidWidth_tiles;
+    int playerBufferWidth_tiles;
+    int contestZoneWidth_tiles;
+    int enemyBufferWidth_tiles;
 };
 
 // Asteroid expansion (REQ-EXP-UNLOCK, REQ-EXP-COST).
 struct WorldExpansion
 {
-    int columnsPerExpansion;
+    int columnsPerExpansion_tiles;
     int costBuildingBlocks;
 };
 
 // Push effects (REQ-PSH-*, REQ-WAV-BOSS-ADVANCE).
 struct WorldPush
 {
-    int    pushExpandColumns;
+    int    pushExpandColumns_tiles;
     double bossAdvanceSeconds;  // boss countdown advanced by this much per push
 };
 
@@ -47,7 +47,7 @@ struct WorldConfig
     double scrapDespawnSeconds;         // REQ-RES-SCRAP-DROP
     double tileSize_m;                  // metres per tile (REQ-GW-TILE-SIZE)
     double beltSpeed_tps;               // REQ-GW-BELT-SPEED (tiles/s, converted from m/s in config)
-    int tunnelMaxDistance;              // REQ-BLD-TUNNEL-PAIR
+    int tunnelMaxDistance_tiles;        // REQ-BLD-TUNNEL-PAIR
     double departureIntervalSeconds;    // REQ-SHP-RALLY
 
     WorldRegions regions;