merge: Support video/x-matroska (MKV) files for embed (!1214)

View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/1214

Approved-by: dakkar <dakkar@thenautilus.net>
Approved-by: Marie <github@yuugi.dev>

packages/backend/src/const.ts

@@ -56,6 +56,9 @@ export const FILE_TYPE_BROWSERSAFE = [
 	'video/webm',
 	'audio/webm',
 
+	// MKV files
+	'video/x-matroska',
+
 	'audio/aac',
 
 	// see https://github.com/misskey-dev/misskey/pull/10686

packages/backend/src/core/SearchService.ts

@@ -34,6 +34,7 @@ type Q =
 	{ op: 'or', qs: Q[] } |
 	{ op: 'not', q: Q };
 
+// Sync with consts.ts and const.ts
 const fileTypes = {
 	image: [
 		'image/webp',
@@ -42,12 +43,20 @@ const fileTypes = {
 		'image/avif',
 		'image/apng',
 		'image/gif',
+		'image/bmp',
+		'image/tiff',
+		'image/x-icon',
 	],
 	video: [
 		'video/mp4',
 		'video/webm',
 		'video/mpeg',
 		'video/x-m4v',
+		'video/ogg',
+		'video/quicktime',
+		'video/3gpp',
+		'video/3gpp2',
+		'video/x-matroska',
 	],
 	audio: [
 		'audio/mpeg',
@@ -58,6 +67,9 @@ const fileTypes = {
 		'audio/opus',
 		'audio/ogg',
 		'audio/x-m4a',
+		'audio/mp4',
+		'audio/x-flac',
+		'audio/vnd.wave',
 		'audio/mod',
 		'audio/s3m',
 		'audio/xm',