Fix NDC Enhancement page crashing/not loading

[SARodrigues]

Description

This PR fixes the "NDC Enhancement Tracker" page crashing when the user visited Explore NDCS first.

It also includes some minor fixes to address some of the console errors found during the debugging process, as well as a couple tweaks in an attempt to make it so that similar issues don't crash the page in its entirely.

[what-the-diff]

PR Summary

• Design Modifications Applied to Maps
  The changes in the code are to correct errors that occur when certain manipulations are done on the maps displayed in the application. These include adjusting the properties of the country highlight styles, correcting the way data related to each country is stored and filtered, and modifying how certain elements appear on the map.

• Exploration Page Changes
  This update modifies how data related to country commitments to climate change (referred to as NDCs) is fetched and managed on the exploration page. Moreover, clarifications and corrections have been made to the map elements on this page.

• Enhancements to Tables on NDC Page
  Similar changes of data management and filtering that were applied to maps are also implemented to the tables displayed on the NDC page.

• Improved Efficiency in Data Fetching
  Certain actions and reducers responsible for achieving data-related tasks have been renamed to better reflect their function. This helps in improving the readability of the code and makes it easier for other developers to understand the code workflow.

• Clarifications Added and Typos Corrected
  A handful of changes were made to clean up the code. These include fixing typographical errors, improving function explanations, and making sure that every major element in the code carries a distinctive identification key.

[Bluesmile82]

Looks nice! Check my comment

[Bluesmile82]

This looks like an object. We are adding attributes to it

[SARodrigues]

Thank you for catching that.