feat: add type of export on filename

mygb.sh

@@ -133,7 +133,7 @@ _wait_export_finished() {
 }
 
 _download_project_export() {
-  export_filename="${project/\//-}_$(date +"%Y%m%d_%H%M")_export.tar.gz"
+  export_filename="$(date +"%Y%m%d_%H%M")_project_${project/\//-}_export.tar.gz"
   _api GET "projects/${project_url_encoded}/export/download" "-o ${export_filename}"
   echo "The project was exported :"
   ls -l "${export_filename}"
@@ -167,7 +167,7 @@ _wait_group_finished() {
 }
 
 _download_group_export() {
-  export_filename="${group/\//-}_$(date +"%Y%m%d_%H%M")_export.tar.gz"
+  export_filename="$(date +"%Y%m%d_%H%M")_group_${group/\//-}_export.tar.gz"
   _api GET "group/${group_url_encoded}/export/download" "-o ${export_filename}"
   echo "The group was exported :"
   ls -l "${export_filename}"