Hdl stable

[AdamVerner]

it somewhat works together, so we should merge it.

if it's good enough, maybe merge it into master too?

[AdamVerner]

• [ ] add trigger placement 0-100
• [x] force trigger over uart
• [x] send message after sampling is done
• [ ] timeout to sampling script
• [x] sampling speed

[AdamVerner]

trigger placement is not priority, so skipping that for now