✨ Add Alexa Lists feature

[NLueg]

Proposed Changes

As requested in #1251 here is the way I managed it to include the Alexa lists api with Jovo.
I've added a new documentation section for it and added an example which shows how to include it in the real world.

This PR also contains some changes to the api to make it easier to get an item from a specific list.
Lastly, it contains a small bugfix as the current permission string for Alexa lists is wrong.

I still have an issue with uploading the package, but I found a workaround for it.
I don't include the workaround here, but I could think about doing this. You can find more information about it in #1419

Can't wait for your feedback!

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

[jankoenig]

Thanks a lot @NLueg 🎉

I'll take a look at the docs early next week

[jankoenig]

Thanks a lot @NLueg 🎉