Include short-code to embed SVG images

Including SVG images using standard markdown disables certain features. This commit adds a short-code that allows embedding SVG images. By embedding the SVG image, its features are retained. SVG features include clickable linked areas, hover texts, etc.

Usage example: {{< svg "/images/example.svg" >}}

Signed-off-by: Sietze van Buuren Sietze.vanBuuren@de.bosch.com