Multi feature request

[Mahantor]

1 - Add black theme
2 - Ability to put a password on the application and open a password with finger print or PIN or password or face unlock
3 -
And I think it's confusing for someone who has a lot of notes to display folder notes in the Note field if this section is only dedicated to folderless notes it's better

4 - Add the ability to insert image audio, drawing and task
https://user-images.githubusercontent.com/91434001/230965960-59821d15-0ba4-4824-8fa8-f38359aa8b05.mp4