Ensure we have Pinned Posts in the Sample DB

[palisadoes]

Is your feature request related to a problem? Please describe.

1. We need to ensure that the pinned post functionality works without hard coded layouts for them
2. This requires us to have a few pinned posts in our sample DB

Describe the solution you'd like

1. Ensure there are 12 pinned posts in the sample DB
2. Each must have different content
3. The posts must successfully load as part of the setup process

Describe alternatives you've considered

• N/A

Approach to be followed (optional)

• See above

Additional context

• N/A

Potential internship candidates

Please read this if you are planning to apply for a Palisadoes Foundation internship

• Student Internship Programs talawa#359

[im-vedant]

@Cioppolo14 assign