* move getApiUrl to api folder
* adjust imports
* tanstack-query example with homeData
* small adjustments
* fix key collision
* new MusicSource persistent mechanism example
* add error handling & set sveltekit to SPA mode
* remove unnecessary ssr test
* chore: adjustments for local development without containers
* update Contributing.md
* remove dev section from readme and link to contributing doc
* move settings import to runtime