Docs: merge Appendix B and Appendix C

[jjohannes]

• Appendix B is generated based on the CapabilityDefinition enum and contains all capabilities (and looks a bit crappy)
• Appendix C is manually maintained and contains only logging capabilities (and looks nicer and has descriptions)

The idea is to pimp the generator for B to generate the table format that we currently have in C. The CapabilityDefinition enum should get an additional (optional) field for the description. This way, the descriptions can move into the code and can be picked up by the generator. Appendix C can then be removed.