[Feature Request]: J-Link settings - RTT support

### Description

Build up on #617 and extend debug configurations to support RTT features in combination with telnet settings.
Split from original issue, at risk of making it into 1.3.0 release.

### Is this request a Security Requirement?

- [ ] Yes

### Priority

High

### Related Issues (Optional)

_No response_

### Additional Notes (Optional)

_No response_