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 @ synced/fix_nwb_folder

Samuel Garcia 42b8f69af8 gin commit from samuel-pc		3 lat temu
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dataset_description.json	e0ae10ea0b gin commit from Saksham	3 lat temu
participants.tsv	e0ae10ea0b gin commit from Saksham	3 lat temu