fix #30 - enh initEnv to also remove form the path cpp-ptb cpp-bids and the experiment sub folders

[marcobarilari]

I propose to implement the uninit dependencies implementing actions in the initEnv function. To me is cleaner in the whole picture of the experiment.

Though, @remi could you check yourself if you are able to uninit cpp-bids? on my computer, I can add it to the paths via this impementation but I cannot remove it cause (I think) here in `ccp_bids.m

function uninitCppBids()
    %
    % Removes the added folders from the path for a given session.
    %
    % USAGE::
    %
    %   uninitCppPtb()
    %

    % (C) Copyright 2021 CPP_BIDS developers
    
    global CPP_BIDS_INITIALIZED
    global CPP_BIDS_PATHS
    
    if isempty(CPP_BIDS_INITIALIZED) || ~CPP_BIDS_INITIALIZED
        fprintf('\n\nCPP_BIDS not initialized\n\n');
        return

    else
        rmpath(CPP_BIDS_PATHS);

        if isOctave
            clear -g CPP_BIDS_INITIALIZED CPP_BIDS_PATHS;
        else
            clearvars -GLOBAL CPP_BIDS_INITIALIZED CPP_BIDS_PATHS;
        end

    end

end

global CPP_BIDS_INITIALIZED and global CPP_BIDS_PATHS return respectively [] and [] while should return 1 and the paths in the matlab path

Thanks!

[codecov]

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[Remi-Gau]

Need to install psychtoolbox and then I will check

[Remi-Gau]

had to update CPP PTB to make this work.

cpp-lln-lab/CPP_PTB@777e04a

uninitializing CPP PTB would clear all global variables including those from CPP BIDS that contain info about the CPP BIDS path.

it worked on my side.

will merge but feel free to reopen issue / PR if this is still an issue for you.