Fixes the examples that were broken after the function was introduced.

The runtime sorts blend modes by its preference.
Just use its highest preference.

* update packaging condition
* remove pages stage

Fix haptics in action sample.

Add FDO_DISTRIBUTION_DATE variable and bump date.

Remove unused shaders.
Remove pointer tip.
Remove unused pipelines.
Get rid of lights.
Use same pipeline for pointer and brackground.
Drop render_scale.
Get rid of pipeline cache.
Make example a gobject. Merge with renderer.
Remove unused functions and simplify.

Get rid of gxr-types.h and gxr-enums.h