"Need for writing first interaction information"

Solves #639 (closed)

Writes out the

• pdg ID
• position
• momentum vector
• time
• dX

applications/c8_air_shower.cpp

@@ -572,7 +572,8 @@ int main(int argc, char** argv) {
   // register ZHS with the output manager
   output.add("ZHS", zhs);
 
-  InteractionWriter<setup::Tracking, ParticleWriterParquet> inter_writer(showerAxis, observationLevel);
+  InteractionWriter<setup::Tracking, ParticleWriterParquet> inter_writer(
+      showerAxis, observationLevel);
   output.add("interactions", inter_writer);
 
   // assemble the final process sequence with radio