Move code for new file formats from GTrackCore to HB

[sveinugu]

• BigBed
• BigWig
• VCF

[sveinugu]

@radmilak Is there anything to do in the "Support X" issues above?

[radmilak]

@sveinugu see my comment on this issue: https://app.zenhub.com/workspaces/elixir-oslo-5e2fa59480ef93e1d919fc6d/issues/hyperbrowser/genomic-hyperbrowser/127

[radmilak]

branch: https://github.com/hyperbrowser/genomic-hyperbrowser/tree/ft_master/new_fileformats_support