fix#95BeagleY-USB-C-power-description-wrong

See merge request docs/docs.beagleboard.io!181

beaglev-ahead/quickstart: add info for uart access

See merge request !189

there is a known issue with this board, that garbage
values are displayed when using some cables. Refined
the instructions for accessing UART debug console.

Added some information regarding the cable not included
in the box.

Add PocketBeagle 2 documentation updates

See merge request !188

Fix build errors and BeagleY-AI demos index

Closes #85

See merge request !187

fix#84feedback-missing-pointers

See merge request !184

PicoRV-Softcore documentation

See merge request !179

See merge request !175

See docs/docs.beagleboard.io!175
for some of my motivation on these fixes