Implemented HLS player (client-side), added scaffold for server-side HLS streamer

internal/httpserver/api/hls.go

@@ -0,0 +1,5 @@
+package api
+
+func RegisterHlsEndpoints() {
+
+}

internal/httpserver/start.go

@@ -14,6 +14,7 @@ func Start() {
 	api.RegisterMiscEndpoints()
 	api.RegisterAuthEndpoints()
 	api.RegisterLibraryEndpoints()
+	api.RegisterHlsEndpoints()
 
 	RegisterWebui()