test: add test jack detection if DSP is suspended

[arikgreen]

Add a new test case to test jack detection during DSP is in D3 state.
The test will check if the jack detection status is updated correctly when the jack is plugged in and unplugged and also if DSP status is changing correctly as well.
For unplug/plug headset jack is using a USB relay.
https://github.com/darrylb123/usbrelay

[Copilot]

Pull Request Overview

Adds a new test case to verify jack detection functionality when the DSP is in D3 suspended state. The test uses a USB relay to simulate physical jack plug/unplug events and validates that both jack detection status and DSP power state changes are handled correctly.

• Implements automated jack detection testing using USB relay hardware
• Validates DSP state transitions during jack events while suspended
• Includes comprehensive error handling and configuration options

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[marc-hb]

Suggested change

	# shellcheck disable=SC1091 source=case-lib/relay.sh
	# shellcheck source=case-lib/relay.sh

When someone runs shellcheck outside the top directory, you do want shellcheck to warn them that it cannot find this file.

[arikgreen]

@marc-hb I applied same as for lib.sh

[marc-hb]

I commented only once but I think disable=SC1091 should be removed in both cases.

• Either people run shellcheck -x from the top-level directory as they should. in that case disable=SC1091 is not needed because shellcheck successfully includes the files.
• Or, people forget -x or run shellcheck from a different directory. Then, you want the first warning (out of many other warnings) to be "could not find include files". So, you don't want disable=SC1091 there either because you don't want to lose the most important warning.

So you never want disable=SC1091

[arikgreen]

thanks Marc, I agree

[marc-hb]

Afraid disable=SC1091 came back :-(
It's in two other files as well.

[redzynix]

Some minor changes needed