[FEATURE] View and edit meeting invite flow

[JakubKoralewski]

Once #18 lands and you are able to view someone invited you, you should be able to do one of these:

1. edit the datetime and show field and resend the new meeting invite
2. decline the meeting invite
3. cancel meeting invite if you're the one who sent it before it was accepted
4. accept the meeting invite

Required for

• [FEATURE] Create meeting flow #14
• [FEATURE] /user/[id]/meetings #24

Blocked by

• [FEATURE] Receive notifications #18