Add two admin operations on the OATH protocol layer: --reset (RESET
0x04/0xDEAD) and --set-password, which sets an access password after a
successful import only if the applet has none. Fix _parse_select to mask
the SELECT ALGORITHM tag to its low nibble (the applet reports the full
type|algo byte, e.g. 0x21), which previously broke validate on a locked
applet. Add a clean top-level OathError handler.