Add Mistel Barocco MD770

[freiheit]

• [x] Keyboard name: Mistel Barocco MD770
• [x] Url to vector graphic (e.g. svg, pdf, etc.) of switch plate: PDF "User Manual" here has layout that might work: https://mistelkeyboard.com/products/d11cf7a73da49468e2a530b4cf18e76c
• [x] Min and max number of keys: 85
• [ ] Url to keyboard project source (if available):
• [x] Url to store to buy keyboard (if available): https://mechanicalkeyboards.com/shop/index.php?l=product_detail&p=5695 or https://smile.amazon.com/Mistel-Bluetooth-Mechanical-Ergonomic-DoubleShot/dp/B08GX7RJ6M?ref_=ast_sto_dp&th=1&psc=1

Note there's multiple versions of this keyboard, but all same layout and all have several switch options. USB, USB+RGB, BT+RGB, USB+BT+RGB...