Add descriptions for Workshops and Freizeiten

content/projekte/hack-n-fun/freizeiten.md

content/projekte/hack-n-fun/freizeiten/froglabs.md

content/projekte/hack-n-fun/freizeiten/hacknsun.md

content/projekte/hack-n-fun/workshops.md

content/projekte/hack-n-fun/workshops/3dmodels.md

package.json

static/images/3DDruck.jpg

static/images/elektronikbasteln.jpg

static/images/froglabs_banner.png

static/images/hacken_am_Lagerfeuer.jpg

static/images/minetest-screenshot.jpg

static/images/sponsoren/speedpartner.png

templates/footer.html

templates/shortcodes/further.html