Improve fmu-dataio examples (including change to improved export functions)

[jcrivenaes]

This is tied to a major task on simplify data export with data product wrappers in fmu.dataio, e.g. equinor/fmu-dataio#765

Simplified functions for

• Add export of available standard results #31
• field outlines
• grid export with properties
• mappings (like FIPNUM coupling to regions/zones)
• Standard metadata for seismic
• etc...

[rnyb]

Include standard export for triangulated fault surfaces #66