App settings

[pmbstyle]

Description

This PR brings app settings for Alice, enabling a production build without needing an env file.
App settings will be stored locally and preserved during app updates and re-installation.

Changes:

• adds settings view and settings menu item
• adds logic to save and load settings on app init
• adds non-initialized state when settings are not defined
• adds a video for non non-configured state
• blocks actions non non-configured state
• adds settings validation and testing before saving

Note: for dev build, you still will need .env file with env variables defined.

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other