Write button_configuration

[balk77]

Write [docs/button_configuration.md](docs/button_configuration.md)

Suggestions for content:

• General concept, explaining eventtypes
• Numbering of buttons
• Label & Toplabel
• Eventtypes:
• Label, with example
• Toplabel, with example
• Click, with example
• Longclick, with example
• Click Release, with example
• Blue/Red/Green LED, with example
• RGB Led
• Led
• Brightness

[balk77]

working on it