P3 51 connect redux to component

[JesserH]

Context

• In this code we connect the first and following redux actions to the components:

1. Modal-opened REDUX ACTION, which opens the modal
2. Modal-dismissed REDUX ACTION, which corresponds to the dismissal of the modal
3. Change-database REDUX ACTION, which corresponds to changing the country of the database in the dropdown menu, in the related-keyphrases component ( P3-5: Create SEMrush Related-Keyphrases ComponentBLOCKED )
4. New-request REDUX ACTION, which corresponds to the functionality of using the “Change country“ button in the related-keyphrases component ( P3-5: Create SEMrush Related-Keyphrases ComponentBLOCKED ), after which a new request is made with the new database

• Furthermore we add some architectural changes to the containers which are discussed with @herregroen and @jcomack

Summary

This PR can be summarized in the following changelog entry:

• non-user facing

Relevant technical choices:

• The containers are restructured and split up - The modal actions are dispatched in a separate container from the semrush container

Test instructions

This PR can be tested by following these steps:

• Checkout this branch and build
• Make sure to have redux devtools installed
• Enter a keyphrase and hit the get related keyphrases button
• Make sure the MODAL_OPEN action gets called from 'yoast-seo/editor' within the redux dev tools and make sure that the expected values appear in the state
• Ensure the same for MODAL_CLOSE when closing the modal and make sure that the expected values appear in the state
• Open the modal again and select a country form the select box
• Ensure that the CHANGE_DATABASE action is called and make sure that the expected values appear in the state
• Close the modal and reopen and verify that it still contains the chosen country as preset
• Hit the change country button and verify that the NEW_REQUEST button is hit and make sure that the expected values appear in the state

UI changes

• This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Quality assurance

• I have tested this code to the best of my abilities
• I have added unittests to verify the code works as intended

[jcomack]

CR done 👍

[jcomack]

Accceptance done 👍