New ReactOS Website: Redo the Jobs page

Redo the Jobs page:

• Explain the possibility of granting scholarships to students and hiring freelancers for specific tasks.
• Make the page more appealing to potential new developers: A long time ago, we used to emphasize that the ReactOS Team is not an exclusive club. The current page is the opposite of that and tells everyone how special and exclusive ReactOS development is, and that you probably don't have the required skills. This is not a way to attract new developers...