Send notification to inviter when a team invite is accepted

[joepavitt]

Description

• Records a notification for the inviter when the invitee accepts an invitation as a new team-invite-accepted-invitor type
• Adds relevant .vue components to display the notification, which navigates to the team member's page when clicked.

Not sure what tests, if any, need to be added here?

Related Issue(s)

Closes #4379

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.34%. Comparing base (1818cf0) to head (a8931c1).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4385   +/-   ##
=======================================
  Coverage   78.33%   78.34%           
=======================================
  Files         293      293           
  Lines       13567    13571    +4     
  Branches     3052     3052           
=======================================
+ Hits        10628    10632    +4     
  Misses       2939     2939           

Flag	Coverage Δ
backend	78.34% <100.00%> (+<0.01%)	⬆️

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[Steve-Mcl]

@joepavitt want this merged now?

[joepavitt]

Yep, I was just waiting for those UI Tests to pass - I'll merge - thanks Steve