Audio transcription support (#18398)

* install new packages for transcription support

* add config options

* audio maintainer modifications to support transcription

* pass main config to audio process

* embeddings support

* api and transcription post processor

* embeddings maintainer support for post processor

* live audio transcription with sherpa and faster-whisper

* update dispatcher with live transcription topic

* frontend websocket

* frontend live transcription

* frontend changes for speech events

* i18n changes

* docs

* mqtt docs

* fix linter

* use float16 and small model on gpu for real-time

* fix return value and use requestor to embed description instead of passing embeddings

* run real-time transcription in its own thread

* tweaks

* publish live transcriptions on their own topic instead of tracked_object_update

* config validator and docs

* clarify docs

web/public/locales/en/views/explore.json

@@ -103,12 +103,14 @@
         "success": {
           "regenerate": "A new description has been requested from {{provider}}. Depending on the speed of your provider, the new description may take some time to regenerate.",
           "updatedSublabel": "Successfully updated sub label.",
-          "updatedLPR": "Successfully updated license plate."
+          "updatedLPR": "Successfully updated license plate.",
+          "audioTranscription": "Successfully requested audio transcription."
         },
         "error": {
           "regenerate": "Failed to call {{provider}} for a new description: {{errorMessage}}",
           "updatedSublabelFailed": "Failed to update sub label: {{errorMessage}}",
-          "updatedLPRFailed": "Failed to update license plate: {{errorMessage}}"
+          "updatedLPRFailed": "Failed to update license plate: {{errorMessage}}",
+          "audioTranscription": "Failed to request audio transcription: {{errorMessage}}"
         }
       }
     },
@@ -173,6 +175,10 @@
       "label": "Find similar",
       "aria": "Find similar tracked objects"
     },
+    "audioTranscription": {
+      "label": "Transcribe",
+      "aria": "Request audio transcription"
+    },
     "submitToPlus": {
       "label": "Submit to Frigate+",
       "aria": "Submit to Frigate Plus"

web/public/locales/en/views/live.json

@@ -69,6 +69,10 @@
     "enable": "Enable Audio Detect",
     "disable": "Disable Audio Detect"
   },
+  "transcription": {
+    "enable": "Enable Live Audio Transcription",
+    "disable": "Disable Live Audio Transcription"
+  },
   "autotracking": {
     "enable": "Enable Autotracking",
     "disable": "Disable Autotracking"
@@ -135,6 +139,7 @@
     "recording": "Recording",
     "snapshots": "Snapshots",
     "audioDetection": "Audio Detection",
+    "transcription": "Audio Transcription",
     "autotracking": "Autotracking"
   },
   "history": {