New manpage for the library stuff

Added an own manpage for libraries. Also did some things around it ..
3 jobs for feature/lib in 1 minute and 3 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Test
passed #5214
pycodestyle

00:00:18

passed #5215
shellcheck

00:00:20

passed #5213
unit_tests

00:00:23