Added new installation guide

[MartinaeyNL]

Description

I've added more documentation on the installation for OpenRemote using Docker. My motivation was the amount of people asking for help on setting up custom OpenRemote installations. The goal is to simplify the setup process for configurations other than the demo setup.

I'll add some screenshots later.

Changelog;

• Added new 'How to Install' folder/category, with an extensive 'Install using Docker' page. It contains guides for setting up the demo, deploying an production instance, or how to deploy a custom project. I utilized the Docusaurus tab component to make this possible
• Added custom React component for a clickable card element.
• Added a lot of SVG icons used in the 'How to install' documentation. They originate from materialdesignicons.
• Improved the code block theme for both dark- and light mode.