Create community meeting notes doc

[theadactyl]

Maintaining community meeting notes and agendas in a public Google doc would be a helpful way to easily allow community members to indicate attendance, contribute to notes, and add items to the agenda backlog. If we went this route, we'd need to also do the following:

• create doc in openxla drive
• add openxla-discuss ML as commenters to doc
• add doc to openxla community meeting invite
• add link to doc in meetings directory