Fix PWA icons: remove sizes/type, let bundle auto-resize from source image

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config/packages/pwa.yaml

@@ -22,12 +22,8 @@ pwa:
             - events
         icons:
             - src: '%kernel.project_dir%/public/favicon.png'
-              sizes: 512x512
-              type: image/png
               purpose: any
             - src: '%kernel.project_dir%/public/favicon.png'
-              sizes: 192x192
-              type: image/png
               purpose: maskable
         shortcuts:
             - name: Evenements
@@ -36,32 +32,24 @@ pwa:
               description: Voir tous les evenements
               icons:
                   - src: '%kernel.project_dir%/public/favicon.png'
-                    sizes: 96x96
-                    type: image/png
             - name: Organisateurs
               short_name: Orgas
               url: /organisateurs
               description: Decouvrir les organisateurs
               icons:
                   - src: '%kernel.project_dir%/public/favicon.png'
-                    sizes: 96x96
-                    type: image/png
             - name: Mon compte
               short_name: Compte
               url: /mon-compte
               description: Acceder a mon espace
               icons:
                   - src: '%kernel.project_dir%/public/favicon.png'
-                    sizes: 96x96
-                    type: image/png
             - name: Contact
               short_name: Contact
               url: /contact
               description: Nous contacter
               icons:
                   - src: '%kernel.project_dir%/public/favicon.png'
-                    sizes: 96x96
-                    type: image/png
     serviceworker:
         enabled: true
         src: '%kernel.project_dir%/public/sw.js'