Add doc and tests

[Heiss]

Documenting in vue:

https://vue-styleguidist.github.io/docs/Documenting.html#available-tags

Generate a markdown file from vue doc:

• https://github.com/vuedoc/md

This file could be integrate into the official webpage of RDS.

Testing in vue:

• https://vuejs.org/v2/guide/testing.html
• https://vue-test-utils.vuejs.org/guides/#getting-started

Todo

• [ ] documentation
• [ ] markdown generator
  • [ ] integration into RDS built process
• [ ] tests
  • [ ] store
  • [ ] components