Cleanup init & start

- classe SystemReveDeDragon pour l'init/start
- déplacement de la migration 1.5.34 dans les migrations

module/migrations.js

@@ -29,6 +29,39 @@ class Migration {
 
 }
 
+class _1_5_34_migrationPngWebp {
+  get code() { return "migrationPngWebp"; }
+  get version() { return "1.5.34"; }
+  async migrate() {
+
+    const regexOldPngJpg = /(systems\/foundryvtt-reve-de-dragon\/icons\/.*)\.(png|jpg)/;
+    const replaceWithWebp = '$1.webp';
+    function convertImgToWebp(img) {
+      return img.replace(regexOldPngJpg, replaceWithWebp);
+    }
+    function prepareDocumentsImgUpdate(documents) {
+      return documents.filter(it => it.img && it.img.match(regexOldPngJpg))
+      .map(it => {
+        return { _id: it.id, img: convertImgToWebp(it.img) }
+      });
+    }
+
+    const itemsUpdates = prepareDocumentsImgUpdate(game.items);
+    const actorsUpdates = prepareDocumentsImgUpdate(game.actors);
+    //Migrate system png to webp
+    await Item.updateDocuments(itemsUpdates);
+    await Actor.updateDocuments(actorsUpdates);
+    game.actors.forEach(actor => {
+      if (actor.token?.img && actor.token.img.match(regexOldPngJpg)) {
+        actor.update({ "token.img": convertImgToWebp(actor.token.img) });
+      }
+      const actorItemsToUpdate = prepareDocumentsImgUpdate(actor.items);
+      actor.updateEmbeddedDocuments('Item', actorItemsToUpdate);
+    });
+  }
+}
+
+
 class _10_0_16_MigrationSortsReserve extends Migration {
   get code() { return "creation-item-sort-reserve"; }
   get version() { return "10.0.16"; }
@@ -296,6 +329,7 @@ class _10_3_17_Monnaies extends Migration {
 export class Migrations {
   static getMigrations() {
     return [
+      new _1_5_34_migrationPngWebp(),
       new _10_0_16_MigrationSortsReserve(),
       new _10_0_17_MigrationCompetenceCreature(),
       new _10_0_21_VehiculeStructureResistanceMax(),