Volunteer Tasks list

[anshsrtv]

Is your feature request related to a problem? Please describe.
As a volunteer, I should be able to view the list of tasks.

Describe the solution you'd like

1. Create an API: [get] /api/tasks/org/(org-id)/ which lists the tasks available under that org.
2. It will return an array of task objects which contain
   1. task_id
   2. author
   3. social_media_platform
   4. description
   5. share_type
   6. share_link
   7. share_text
   8. share_img
3. only authenticated user can access this API.
4. make swagger docs for the same
5. add tests for the same

[akhil-maker]

I would like to take this issue

[priyanshisharma]

@akhil-maker we shall work on teesco-backend after completing ecell-main-server, please claim the issues there first.

[akhil-maker]

Ok ma'am @priyanshisharma

[anshsrtv]

@akhil-maker You can now start working on the issue