new modules dedicated to quantum labs

[gkasprow]

1. New revision of the main board. We eliminate RMII (S3 doesn't have MAC) and route SPI+RST+IRQ+GPIO instead, utilising the newer ESP32-S3 chip, which offers more I/O. We need more IOs to address multi-chip peripherals. We also eliminate the I2C expander and the level translator. Add a vertical USB-C connector, leave the original programmer connector.
2. Ethernet + PoE via SPI based on DM9051 MAC+PHY. It has ESP-IDF drivers. Make design based on Single Pair Ethernet module (SPE-SPI) - just replace PHY and add PoE (Ag9900LBP).
3. RF detector based on a single-chip logarithmic converter and ADC with SPI. Use a precise detector like AD8318 + a simple-to-use 16bit ADC like ADS1118. ADS1118 has ESPHOME support.
4. ADC module based on ADS1118 / MCP3561 as above, but with divider to support 0-10V (differential)
5. DAC output 0-10V based on DAC8875
6. 2-channel UART based on WK2168 or WK2132-ISSG; dedicated to sensors transmitting data over UART. Route Rx, Tx, GND, 5V to the connector
7. Precise thermometer based on ad7172; just copy AFE from Thermostat design. Add an optional precision 10uA current source to support 4-wire cryogenic sensors (just an opamp like here)

Use pluggable 2.5mm WURTH terminals everywhere, when possible, unify GND/PWR pins to avoid damage when the wrong plug is inserted.

[gkasprow]

8. Quad 500MS/s DDS module based on AD9959 design from Pounder. Use MCX connectors as in the Lockin design. Make an option for an internal or external clock.
9. Frequency converter. Precisely the same as in Phaser, make an option for internal and external clock
10. Piezo driver ; copy ADHV4702-1 amplifier design from ADI devkit. Implement onboard 16-bit DAC and external +/- 1V input for locking amplifier or similar source
11. 4-channel RF attenuator; just copy one from Urukul