Add team and boards

[ravi11o]

Each logged in user can create team as well as boards.

A board can be created either for personal use or it can be added in a team as well.

A team created, must have

• name(required)
• owner(ObjectId of user)
• members [user's ObjectIds]

Each board created for the team must have

• name
• slug
• owner
• teamId -> If board has been created for team

Optional fields are

• image
• members []

Each board created for personal use should have

• name
• slug
• owner

Optional fields are

• image

Design endpoints to create, update and delete team on your own.
Similarly add endpoints to create/update/delete boards .

Add endpoints to add/remove members from team boards.