Quadlets installed from `.quadlet` file now belongs to a single
application, anyone file removed from this application removes all the
other files as well.
Assited by: claude-4-sonnet
Signed-off-by: flouthoc <flouthoc.git@gmail.com>
Enable installing multiple quadlets from one file using '---' delimiters.
Each section requires '# FileName=<name>' comment for custom naming.
Single quadlet files remain unchanged for backward compatibility.
Assited by: claude-4-sonnet
Signed-off-by: flouthoc <flouthoc.git@gmail.com>