feat(scanner): add support for MIDI model with blackshield configuration

* feat(camera): enhance diagnostics, error handling

- Introduced detailed diagnostics in `gphoto2` controllers with expanded configuration and error reporting.
- Implemented fallback logic for "Unspecified error" during capture on specific camera models.
- Enhanced camera detection and diagnostics in `/next/develop`.
- Added logging for unexpected errors in photo requests and runtime failures.
- Introduced a dedicated Nikon D7100 GPhoto2 profile with tailored startup configuration, RAW capture support, and ISO mapping.
- Introduced `profile_helpers` for reusable profile implementations, including ISO mapping, shutter choice selection, and RAW filename checks.
- Modified `profile_registry` to dynamically discover and register all camera profiles at startup.
- Updated documentation to reflect the automatic profile discovery process.

- Added detailed HTTP exception handling for GPIO endpoints in `v0.8`, `v0.9`, and `next` routers.
- Enhanced `gpio.set_output_pin` to support auto-initialization of unconfigured pins.
- Updated return types for GPIO endpoints to include response models.
- Improved validation and logging in `gpio` hardware controller to handle invalid operations consistently.

…e handling

…nality

- Introduced `camera_preview_enabled` setting for trigger-only setups without live preview.
- Extended QR WiFi auto-start logic to respect camera preview setting.
- Introduced unified `Trigger` interface for standardizing triggerable hardware.
- Added support for defining and executing external trigger runs via GPIO.
- Added `ExternalTriggerRunTask` for managing trigger sequences and paths.
- Updated device, settings, and schema to include new trigger objects.
- Reorganized `next` and OpenAPI routes to reflect trigger consolidation.
- Introduced comprehensive tests for `external_trigger` and `external_trigger_runs` routers.
- Removed `EXTERNAL` camera type, refactored code accordingly.

Hardware controller for gpio triggers for external cameras