TN20k adjust updated companion

updated to match to new companion firmware and core configuration (JTAG always activated)

Primer 25k Mega 138k Pro Console 138k support

• fix video output character appearance
• add support for Tang Primer 25k
• add support for Tang Mega 138k Pro
• add support for Tang Console 138k

Maintenance

• adds the framework
• adds keyboard input to talk to BL616 console
• improves slightly video output

Video and Keyboard are still a bit buggy...

TC138k and TM138Pro removed for the time being

TN20k support

• TN20k support
• attempt for Mega138Pro (not working)

v0.1 Tang onboard Console Debug Display

initial