LamineCisse/BEP032-examples: channel_type added in channel.tsv (BEP standard) add PowerLineFrequency in ephys-json for ephys_nwb_petersen file add PowerLineFrequency and PowerLineFrequencyUnit in ephys-json for ephys_nix file @ 42b8f69af825729a34727c2d8d5f0dcf1912a02b

Samuel Garcia 42b8f69af8 gin commit from samuel-pc		%!s(int64=3) %!d(string=hai) anos
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sub-MS21_ses-PeterMS21180622174411_channels.tsv	42b8f69af8 gin commit from samuel-pc	%!s(int64=3) %!d(string=hai) anos
sub-MS21_ses-PeterMS21180622174411_contacts.tsv	7341a55b83 gin commit from Saksham	%!s(int64=3) %!d(string=hai) anos
sub-MS21_ses-PeterMS21180622174411_ephys.json	7341a55b83 gin commit from Saksham	%!s(int64=3) %!d(string=hai) anos
sub-MS21_ses-PeterMS21180622174411_ephys.nwb	7341a55b83 gin commit from Saksham	%!s(int64=3) %!d(string=hai) anos
sub-MS21_ses-PeterMS21180622174411_probes.tsv	42b8f69af8 gin commit from samuel-pc	%!s(int64=3) %!d(string=hai) anos