simtrace2-cardem-pcsc doesn't read ATR from card/reader
During manual testing I noticed that simtrace2-cardem-pcsc only has the option of
- using a compiled-in default ATR
- using a manually provided ATR hexstring from the command line
However, the most obvious approach of reading the actual ATR from the card/reader and passing that to cardem (like it is done in osmo-remsim) is not implemented.