[MEM-81] Request: search option within a community

[chowanana99]

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

Right now it is not possible to search specific posts within a community

Describe the solution you'd like

A search icon (at the top?) in order to search posts containing specific words (maybe also with certain tags, such as nsfw; I don't know if there are others)

_MEM-81