feat(homekit): add HKSV support with motion detection and doorbell functionality

- Introduced HKSV configuration options in homekit.go, allowing for motion detection and doorbell features.
- Implemented API endpoints for triggering motion detection and doorbell events.
- Enhanced server.go to handle HKSV sessions and manage motion detection states.
- Created new accessory types for HKSV and doorbell in accessory.go.
- Added support for audio recording configurations in ch207.go.
- Defined new services for motion detection and doorbell in services_hksv.go.
- Implemented opack encoding/decoding for HDS protocol in opack.go and protocol.go.
- Updated OpenAPI documentation to reflect new endpoints and features.
- Extended schema.json to include HKSV configuration options.

www/schema.json

@@ -331,6 +331,20 @@
             "items": {
               "type": "string"
             }
+          },
+          "hksv": {
+            "description": "Enable HomeKit Secure Video recording support",
+            "type": "boolean",
+            "default": false
+          },
+          "motion": {
+            "description": "Motion detection mode for HKSV: `api` (triggered via HTTP API) or `continuous` (always report motion)",
+            "type": "string",
+            "enum": [
+              "api",
+              "continuous"
+            ],
+            "default": "api"
           }
         }
       }