feat(server): tone-mapping (#3512)

* added tonemapping

* check for hdr in transcode policy

* merged video thumbnail and transcoding logic

* updated tests

* removed log

* added dashboard option, updated api

* `out_color_matrix` for sdr video thumbs, cleanup

* updated tests & styling

* refactored tonemapping setting

* fixed tests

* formatting

* added tests

* updated api

* set target npl higher for mobius and reinhard

* convert to nv12 before nvenc

* fix test

---------

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/openapi/lib/api_helper.dart

@@ -82,6 +82,9 @@ String parameterToString(dynamic value) {
   if (value is TimeBucketSize) {
     return TimeBucketSizeTypeTransformer().encode(value).toString();
   }
+  if (value is ToneMapping) {
+    return ToneMappingTypeTransformer().encode(value).toString();
+  }
   if (value is TranscodeHWAccel) {
     return TranscodeHWAccelTypeTransformer().encode(value).toString();
   }