[Backend] Improved Team Management

[amlannandy]

Description

This PR brings a number of improvements to the Teams System in the backend. The detailed changes are listed below commit-wise -

Commit 1

• Created various access decorators which can be used on routes to restrict who can access it.
• E.g. Route with @project_owner_only can only be accessed by the creator of a project

Commit 2

• Added access decorators on appropriate routes
• Removed redundant code on those routes

Commit 3

• Created a route for a member to leave a project
• Added message for this route in the logs decorator

Commit 4

• Created routes for granting and revoking admin access to users in a project
• Added messages for both routes in the logs decorator

Commit 5

• Resolved merge conflicts

Commit 6 & 7

• Modified get team by id route to also fetch last 5 logs and details of team members for showing in the TeamDetailsScreen in mobile application

Commit 8

• Created a route to get the roles the current user has in a project
• This route will help in restricting access in the Mobile Application, regulating which actions the user can perform based on their roles

Fixes #592

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Demo Video has been provided below

Test Configuration:

• Postman
• Windows 10

Granting and revoking admin access

Leaving a project

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[ThatUdeshUK]

@amlannandy can you rebase the branch?

[amlannandy]

@amlannandy can you rebase the branch?

Done