Add copyright header for world forge start file (#67)

data/world forge start.txt

@@ -1,3 +1,13 @@
+# Copyright (c) 2023 by warp-core
+#
+# Endless Sky is free software: you can redistribute it and/or modify it under the
+# terms of the GNU General Public License as published by the Free Software
+# Foundation, either version 3 of the License, or (at your option) any later version.
+#
+# Endless Sky is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
 start "world-forge"
 	name "World Forge"
 	description `Tired of starting on New Boston and having to travel to Forge in a ship just to sell it?`
@@ -11,4 +21,4 @@ start "world-forge"
 	account
 		credits 1000000000000
 		score 800
-	set "license: Pilot's"
+	set "license: Pilot's"