chore: use find_package(Git) instead of find_program

style: format in the same way as proxyme stores, no spaces

chore: check if tree is dirty and enable build on non git tree

feat: get git version and hash

docs: simplify build steps

fix out of bounds issue

Patch: Martin Balik

Signed-off-by: Roger Meier <r.meier@siemens.com>