Add operating manual of global team from Google Doc

[maelle]

if/when I get the ok

[maelle]

maybe some edits would be needed e.g. if there is a spreadsheet it might not be linked

[maelle]

@rladies/leadership do you want to add some content about the global team operations or should this be closed?

[drmowinckels]

I think we all agree that as much as possible should be added

[shannonpileggi]

is this related to #117 or different?

[drmowinckels]

I think the intention maybe was more in terms of actual docs of global team tasks and how to perform them, but that's my interpretation