RP2350 target drag-and-drop

Feature/rp2350 target drag and drop

minor Makefile adoptions

Merge pull request #127 from rgrr/feature/rp2350-target

RP2350 as a debug target plus RTT

Merge pull request #117 from rgrr/bug/113-fix-rtt

Reworking SEGGER_RTT_BUFFER access

nickname: change USB serial and DAP_GetSerNumString() to config

parameter

.ONESHELL or not .ONESHELL ...

Merge pull request #89 from rgrr/feature/mini-ncm-fixes

last element of the ready lists has to be cleared, enhanced error

Merge pull request #71 from rgrr/feature/60-build-failure

Should now really build with TinyUSB 0.15.0

Merge pull request #65 from rgrr/feature/misc2

1.16

Merge pull request #45 from rgrr/feature/systemview-rndis

Systemview over TCP