Add return type to GetRawFileOrLFS and GetRawFile (#31680)

Document return type for the endpoints that fetch specific files from a
repository. This allows the swagger generated code to read the returned
data.

Co-authored-by: Giteabot <teabot@gitea.io>

routers/api/v1/repo/file.go

@@ -42,7 +42,7 @@ func GetRawFile(ctx *context.APIContext) {
 	// ---
 	// summary: Get a file from a repository
 	// produces:
-	// - application/json
+	// - application/octet-stream
 	// parameters:
 	// - name: owner
 	//   in: path
@@ -67,6 +67,8 @@ func GetRawFile(ctx *context.APIContext) {
 	// responses:
 	//   200:
 	//     description: Returns raw file content.
+	//     schema:
+	//       type: file
 	//   "404":
 	//     "$ref": "#/responses/notFound"
 
@@ -92,6 +94,8 @@ func GetRawFileOrLFS(ctx *context.APIContext) {
 	// swagger:operation GET /repos/{owner}/{repo}/media/{filepath} repository repoGetRawFileOrLFS
 	// ---
 	// summary: Get a file or it's LFS object from a repository
+	// produces:
+	// - application/octet-stream
 	// parameters:
 	// - name: owner
 	//   in: path
@@ -116,6 +120,8 @@ func GetRawFileOrLFS(ctx *context.APIContext) {
 	// responses:
 	//   200:
 	//     description: Returns raw file content.
+	//     schema:
+	//       type: file
 	//   "404":
 	//     "$ref": "#/responses/notFound"