feat(get_articles): implement endpoints to get articles …

- add a route to get all articles, with pagination support
- add a route to get articles by amount and criteria

[Finishes #164693398]

test/stats.spec.js

@@ -32,7 +32,7 @@ describe('Make a request to signup with valid details', () => {
 });
 
 describe('Create an article by an authenticated and verified user', () => {
-  before(() => { updateVerifiedStatus(validStatUser.email); });
+  before(async () => { await updateVerifiedStatus(validStatUser.email); });
   it('should create a new article.', (done) => {
     chai
       .request(app)