Add The Ability To Search For Articles

[LamboCreeper]

What Functionality Are You Suggesting?

We should introduce a new GET /article/search endpoint which returns any articles which contain a given query. We can use PostgreSQL's LIKE operator to return the results. As we do not have much data this is a perfectly fine solution - there is no need for something like ElasticSearch.

Why Will This Benefit The Community?

This will allow members to easily search for articles, primarily through auto-complete functionality of an upcoming /article command within our Discord community.