rest-countries-api with web components and custom theme switch

• Rest of countries API with color theme, vanilla JavaScript and web components

This is a perfect challenge to test your skills in integrating an app with a third-party API.

• I used the API from https://restcountries.com/ to extract data.
• Added a customized switch for theme change to dark mode.
• The search input is filtering as we type and I implemented a debounce so that it runs every 500 milliseconds.
• The <select> element is customized and implemented with Web Components and accepts normal <option> elements as children.