grove: add grove button support and examples

Signed-off-by: Sarah Knepper <sarah.knepper@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
tp401: grove air quality sensor and examples

Signed-off-by: Mihai Tudor Panu <mihai.t.panu@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
grovetsl2561.jpeg: remove exec permissions on file

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>