Add Svelte Map SDK example

[mletic]

Added the example on how to use Svelte with our Map SDK.

Based it on the Svelte starter project and added some minor things like:

• Prettier
• SCSS pre-processing
• VS code settings for Svelte + SCSS
• Instructions on how to install dependancies, build and run the example

[mletic]

Wow, that is a LOT of boilerplate... Not what one would expect from the standard setup for something named "svelte" :-D

Hah maybe, but it was really easy to work with. I'm liking this "framework". 😊