Rename scripting.proto to main.proto

The cpplib expects that a main.proto exists for each package.

proto/caosdb/CMakeLists.txt

@@ -22,6 +22,7 @@ set(CAOSDB_API_PACKAGES
     caosdb.info.v1
     caosdb.entity.v1
     caosdb.acm.v1alpha1
+    caosdb.scripting.v1alpha1
     )
 
 # pass variable to parent scope