Front-end rendering of search results

[njouud]

This issue will render search results in front-end, its completion will close user story 3, fully implementing the posts search functionality.

Estimated effort:
The task will require about 5 days to complete. Bugs and other issues might take another day to fix. Around 2 days in total.

Dependencies among other tasks:
No dependencies

Initial assignments for team members:
Initially assigned to Najoud Al-Talib, @ntalib

Milestones to indicate which sprint the issue should be completed in:

Acceptance criteria:
This feature will be tested using the keyword "spanish" in the search bar. If the search bar works, NodeBB will return 5 out of the 15 added discussions that have the word "spanish", rendering them in the front-end.