Add long and short title for examples

[jcklie]

For some projects, the name is too long for the heading of the example site, see e.g. https://inception-project.github.io//use-case-gallery/gryphius/ .

Solution: Add new fields to the template for example type, short heading, ... and fill them for all use cases.

Alterative: Add font-size: 1.3vw; to the example heading, then it scales ok enough depending on the viewport size.

[jcklie]

Done

[jcklie]

Not done yet.