Write Introduction to HelMoRo project

[jonaslondschien-helbling]

• [x] Adapt the color band to the correct helbling blau
• [x] Change the link to start building Helmoro to the BoM
• [x] Get Started above BoM, about the important electronics, the sheet metal, the 3D-printing
• [x] Write which tools are required to build Helmoro (and skills)
• [x] add how the naming convention works for the cad file

[jonaslondschien-helbling]

11 has some initial ideas

[jonaslondschien-helbling]

@adrianhess-helbling adapted the issue