feat: implement filament and spool preset services with CRUD operations

- Add `FilamentService` for managing filament inventory, including creation, retrieval, updating, and deletion of filaments.
- Introduce `SpoolPresetService` for handling spool presets, allowing users to create, update, and delete their custom presets.
- Create domain models for `Filament` and `SpoolPreset` with necessary fields and methods.
- Define repository interfaces for filament and spool preset persistence.
- Implement application configuration management from environment variables.
- Set up error handling with a centralized `AppError` type.
- Build the Axum router with public and protected routes for user authentication and resource management.

backend/bruno-routes/MewoSpool/environments/route.yml

@@ -0,0 +1,10 @@
+name: route
+variables:
+  - secret: true
+    name: access_token
+  - secret: true
+    name: refresh_token
+  - name: preset_id
+    value: 0ffa808d-af09-4bc6-9a40-43df3a4c6dd0
+  - name: filament_id
+    value: e1edc611-f020-4234-94e5-db5e1393dbf2