Add section about Rejection causes in the Distribute navbar menu

[undavide]

Description

Add a list of common causes for add-on rejection according to stats compiled by the review team.

Motivation and Context

Trying to raise devs awareness and reduce the rejection rate.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• 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 change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[hollyschinsky]

MUCH better, love the visuals!