eeg

• Need to make it easier to navigate between devices at SupportedBoards page and provide more info about boards. The table in the beginning is getting huge, need to replace it with smth. (maybe there is a way to do smth like here https://brainflow.org/get_started/?)
• Improve DataFormatDescription Page
• Improve AskHelp Page

"Start recording" button should change its name to "Stop recording" once clicked. This needs to be changed for all MNE Scan plugins which are able to record data, see below.

https://github.com/mne-tools/mne-cpp/blob/0273dc540f2a5597d3317edbf76b6169fab94021/applications/mne_scan/plugins/neuromag/neuromag.cpp#L269

https://github.com/mne-tools/mne-cpp/blob/0273dc540f2a5597d3317edbf76b6169fab940