initiate new function to compute all ql for the library

sen2chain/library.py

@@ -170,6 +170,14 @@ class Library:
                 pass
         logger.info("Total size to move: {}".format(human_size_decimal(total_size)))
         
+    def create_all_ql(self,
+                      product_list: list = [],
+                      tile_list: list = [],
+                      ):
+        toto = 52
+        
+        
+    
     def update_latest_ql(self):
         """
         Produce or update the latest quicklook for the L2A library tiles