Automatically add dates to the catalog files

wishlist.toml

@@ -32,6 +32,7 @@ name = "Aktivisda"
 description = "Web application to create visuals using an organization's graphic charter."
 upstream = "https://framagit.org/aktivisda/aktivisda"
 website = "https://aktivisda.earth"
+added_date = 1720803998  # 2024/07/12
 
 [amara]
 name = "Amara"
@@ -2030,6 +2031,7 @@ name = "Tee Worlds"
 description = "An online multiplayer game. Battle with up to 16 players in a variety of game modes."
 upstream = "https://github.com/teeworlds/teeworlds"
 website = "https://teeworlds.com/"
+added_date = 1720804005  # 2024/07/12
 
 [teleport]
 name = "Teleport"