Add initial sections in AppArmor development guide

Added new sections on the topics below, to the existing file content/guides/apparmor.md:

• Profile Introduction
  • Profile Modes
  • System Logs
• Profile Development
  • Manually Write The Profile
  • Tool Aided Profile Development
  • Developing Common Parts For Multiple Profiles
• Capabilities
  • Short intro to Linux capabilities
  • Short summary of the five sets available
  • Explanation of capabilities + AppArmor criteria to be met
  • 2 example profiles for CAP_CHOWN and mount + CAP_SYS_ADMIN

This content will later on need to be reorganized within the file apparmor.md to create a better flow but to not create too large merge request the new content is simply appended at the end in this merge request.