feat(server): transcoding hardware acceleration (#3171)

* added transcode configs for nvenc,qsv and vaapi

* updated dev docker compose

* added software fallback

* working vaapi

* minor fixes and added tests

* updated api

* compile libvips

* move hwaccel settings to `hwaccel.yml`

* changed default dockerfile, moved `readdir` call

* removed unused import

* minor cleanup

* fix for arm build

* added documentation, minor fixes

* added intel driver

* updated docs

styling

* uppercase codec and api names

* formatting

* added tests

* updated docs

* removed semicolons

* added link to `hwaccel.yml`

* added newlines

* added `hwaccel` section to docker-compose.prod.yml

* ensure mesa drivers are installed

* switch to mimalloc for sharp

* moved build version and sha256 to json

* let libmfx set the render device

* possible fix for vp9 on qsv

* updated tests

* formatting

* review suggestions

* semicolon

* moved `LD_PRELOAD` to start script

* switched to jellyfin's ffmpeg package

* fixed dockerfile

* use cqp instead of icq for qsv vp9

* updated dockerfile

* added sha256sum for other platforms

* fixtures

mobile/openapi/test/asset_stats_response_dto_test.dart

@@ -21,13 +21,13 @@ void main() {
       // TODO
     });
 
-    // int total
-    test('to test the property `total`', () async {
+    // int videos
+    test('to test the property `videos`', () async {
       // TODO
     });
 
-    // int videos
-    test('to test the property `videos`', () async {
+    // int total
+    test('to test the property `total`', () async {
       // TODO
     });
 

mobile/openapi/test/system_config_f_fmpeg_dto_test.dart

@@ -16,6 +16,11 @@ void main() {
   // final instance = SystemConfigFFmpegDto();
 
   group('test SystemConfigFFmpegDto', () {
+    // TranscodeHWAccel accel
+    test('to test the property `accel`', () async {
+      // TODO
+    });
+
     // int crf
     test('to test the property `crf`', () async {
       // TODO

mobile/openapi/test/transcode_hw_accel_test.dart

@@ -0,0 +1,21 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for TranscodeHWAccel
+void main() {
+
+  group('test TranscodeHWAccel', () {
+
+  });
+
+}