Implement model optimization and caching for 3D characters

- Added a new modelsProxyRouter to handle requests for optimized 3D character models.
- Introduced modelsProxyService to manage GLB file optimization using gltf-transform with Draco compression.
- Updated app.js to include the new modelsProxyRouter for API access.
- Enhanced .gitignore to exclude model cache files.
- Added scripts for optimizing GLB models and updated README with optimization instructions.
- Integrated DRACOLoader in Character3D.vue for loading compressed models.
- Updated FamilyView.vue to streamline character rendering logic.

frontend/src/views/falukant/FamilyView.vue

@@ -2,14 +2,6 @@
     <div class="contenthidden">
         <StatusBar />
         <div class="contentscroll family-layout">
-            <!-- 3D-Modell für man selbst links -->
-            <div class="self-character-3d" v-if="ownCharacter">
-                <Character3D 
-                    :gender="ownCharacter.gender" 
-                    :age="ownCharacter.age" 
-                />
-            </div>
-
             <div class="family-content">
             <h2>{{ $t('falukant.family.title') }}</h2>