[CWM] Link front-end UI to the API

[lin-d-hop]

Description

Following the completion of #272 we need to connect together the FE filter panels to the functional search/filter methods.

I would suggest a first step will be for @ms0ur1s and @rogup to have a call and break down this epic into a checklist of tasks. That process looks like it works really well. Nice one team :raised_hands:

Sub-tasks

• [x] Add mock config data for the front-end UI #40
• [x] Link search panel (searchbox and dropdowns) to Redux #40
• [x] Link directory panel to Redux
• [x] Link Redux up to the current version of the API (getDataset, searchDataset, getDatasetItem, getConfig, getVersion)
• [x] Render popups in the UI when MapLibre markers are clicked
• [x] Implement react-I18N combined with MM vocabs for localisation of UI text #57
• [x] Add About panel #60

Acceptance Criteria

• All panel functionality is working as expected
• I18N should be in place, switchable via a URL query param
• Checklist of tasks is fully completed

[ColmDC]

Assuming this should have been closed a while ago.