[feature] add keys state to allow toggle keys

[willianrod]

Description

To have a toggle feature or even show custom images depending on some situations, we will need to store states to each key.

Use cases:

• Mute/Unmute microfone
  • I want to show a different image depending if the microfone is muted or unmuted on a key.
• Spotify current playing song
  • I want to show the cover of the current playing song and it needs to update when a new song comes up
• Clock
  • I want to show the current time in a key

[jvfrodrigues]

Hey there was a PR for this issue is it done?