Add Support for Multiple TA Training Types

Description

• Adds multiple TA training types
• Refactors/redesigns the coordinator programme management page
• Adds footer to every page
• Moves TUDelft logo to the footer
• Adds links to documentation (in footer and header)
• Fixes some minor bugs (although I think Ruben already fixed them on dev)

Related Issues

• Resolves #92 (closed)
• Resolves #158 (closed)
• Resolves #159 (closed)

Checklist

• I have added a changelog entry to reflect the significant changes I made.