Update character assets from PNG to WEBP format and adjust size data in manifest.json

registry.json

@@ -1,12 +1,12 @@
 {
   "schemaVersion": 1,
-  "updatedAt": "2026-05-26",
+  "updatedAt": "2026-05-27",
   "packs": [
     {
       "id": "2xko",
       "name": "2XKO",
       "version": "1.0.0",
-      "totalSizeBytes": 6719492,
+      "totalSizeBytes": 4905440,
       "logoPath": "2xko/logo.png",
       "characterCount": 14,
       "palette": {
@@ -97,7 +97,7 @@
       "id": "rivals-of-aether-ii",
       "name": "Rivals of Aether II",
       "version": "1.0.0",
-      "totalSizeBytes": 65441117,
+      "totalSizeBytes": 37812582,
       "logoPath": "rivals-of-aether-ii/logo.png",
       "characterCount": 16,
       "palette": {
@@ -123,7 +123,7 @@
       "id": "street-fighter-6",
       "name": "Street Fighter 6",
       "version": "1.0.0",
-      "totalSizeBytes": 3149196,
+      "totalSizeBytes": 15744924,
       "logoPath": "street-fighter-6/logo.png",
       "characterCount": 29,
       "palette": {
@@ -136,7 +136,7 @@
       "id": "tekken-8",
       "name": "TEKKEN 8",
       "version": "1.0.0",
-      "totalSizeBytes": 56204650,
+      "totalSizeBytes": 36559438,
       "logoPath": "tekken-8/logo.png",
       "characterCount": 40,
       "palette": {