refactor articleFinder to functional component

[justiceotuya]

NOTE: Please review the pull request process before opening your first PR: https://github.com/WikiEducationFoundation/WikiEduDashboard/blob/master/CONTRIBUTING.md#pull-request-process

What this PR does

This PR refactors articleFinder from using class component to using functional components from this Issue #5393

Screenshots

Before:

After:

Open questions and concerns

• I created a constants file to move away constants
• I created a hooks folder/file to abstract redux boilerplate selector logic

[justiceotuya]

@ragesoss please can i be added to the slack group [email protected] also can you approve the workflow as the test is failing on the ruby end even though I did not work on that end

[justiceotuya]

@Aminehassou