Invite people to take over a task

[anisha-e10]

Implemented #2914

This PR includes the following features:

• Display of Invited Users: The invited people for a task are now displayed.
• Invitation Management: Users can retrieve their specific task invitations.
• Accept/Reject Invitations: Users can accept or reject invitations.
• If a user accepts an invitation, the task will be added to their Assigned Tasks view.
• New View Added: A dedicated view has been created and implemented for managing invitations and displaying assigned tasks.

Reference Image(When you get invitation) :

Reference Image(After accept Invite) :

Reference Image(people who are invited for task) :

Reference Image(Also displayed in activity) :

[github-actions]

Hey there 👋,
and thanks for the contribution. But it seems like you forgot to

• 📰 Add a markdown file in .changes/ explaining what changed

[codecov]

Codecov Report

Attention: Patch coverage is 78.46154% with 56 lines in your changes missing coverage. Please review.

Project coverage is 47.27%. Comparing base (060ef6c) to head (be39519).

Files with missing lines	Patch %	Lines
app/lib/features/tasks/providers/notifiers.dart	76.47%	16 Missing ⚠️
...features/tasks/widgets/task_assignment_widget.dart	74.13%	15 Missing ⚠️
...eatures/tasks/widgets/task_invitations_widget.dart	74.19%	8 Missing ⚠️
...b/features/tasks/actions/assign_unassign_task.dart	82.60%	4 Missing ⚠️
app/lib/features/member/widgets/user_builder.dart	82.35%	3 Missing ⚠️
...features/invite_members/widgets/direct_invite.dart	50.00%	2 Missing ⚠️
...pp/lib/features/member/actions/invite_actions.dart	87.50%	2 Missing ⚠️
...widgets/accept_decline_task_invitation_widget.dart	92.59%	2 Missing ⚠️
...pp/lib/router/shell_routers/home_shell_router.dart	0.00%	2 Missing ⚠️
.../invite_members/pages/invite_individual_users.dart	66.66%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3055      +/-   ##
==========================================
+ Coverage   46.76%   47.27%   +0.51%     
==========================================
  Files         948      953       +5     
  Lines       57845    58008     +163     
==========================================
+ Hits        27049    27425     +376     
+ Misses      30796    30583     -213     

Flag	Coverage Δ
integration-test	57.99% <ø> (-0.03%)	⬇️
unittest	40.20% <78.46%> (+0.91%)	⬆️

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[gnunicorn]

run-by commentary