Add friendly data keys for unknown type_code[3] entries: 33, 34, 36, 65, 97

[joshduran]

These are all multi-channel measurements (e.g. sm-2ch, a-2ch, sm-3ch, rf-4ch) codes. Current version parses the data and assigns matching data status blocks properly, but without readable codes (e.g. sm_33, _36, sm_65, rf_97).

Update the constants and methods for getting data keys to use friendly keys for these codes.

Example files posted in other issues:

spectral-cockpit/opusreader2#67

wincowgerDEV/OpenSpecy-package#118

qedsoftware/brukeropusreader#17

[joshduran]

Fixed in version 1.1.0