Started re-tracking. Also sets up board stack to JLCPCB 7628

Replaced decoupling caps, and worked on PCB layout.

Label tweaks

Merge pull request #100 from Neotron-Compute/add-a-beeper Added a PC Speaker output.

Added a PC Speaker output. To free up a BMC pin, the HDD LED is now driven from the I/O mux.

Merge pull request #98 from Neotron-Compute/rework-audio-circuit Reworked audio circuit.

Reworked audio circuit. Based on TLV320AIC23B evaluation board. Removed Pi filters. Used SMD electrolytic caps for headphone out.

Merge pull request #97 from Neotron-Compute/remove-duplicate-part-nos Remove duplicate part nos

Reset the version/date to something generic.

Cleaned up the part numbers.