Add an introduction sentence on the package download page

Could be interesting to add a sentence like this before the list of packages :

Welcome to the Eclipse download page, where you can choose the best package suited to your specific development needs. Select the package that aligns most closely with your focus area, knowing that you can always add other components and tools to any package later on. This flexibility ensures you have everything needed to start working in your domain with confidence, while keeping the option to expand as your project grows.