Have PointCloud output default to COPC

[j9ac9k]

in codem the output defaults to the format of the input files (.las vs .laz), and in the VCD, it defaults to las 1.2 for ESRI/ArcGIS compatibility.

both CODEM and VCD should default to writing copc files for output, but with a command line option to write the output to LAS 1.2 (so we can maintain ArcGIS compatibility).