Properly include config.h and check for system headers

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
J4statusSection: Automatically trigger display

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
J4statusColour: Add reset and parse_length API

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
i3bar: Add input support

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>