Add SDIO Support to solve the speed bottleneck about esp32_bridge_broadcast HOT 2 OPEN

This is something I played with a few years ago, but honestly I don't remember the reason I abandoned it. In the end - for another project - I went with SPI as it was fast enough to keep up with the video rates I needed.
So air unit had an esp32 sending with packet injection and on the receiving side I used another esp32 connected through SPI to the PI.
Check my other repo for this, including a user-space library to drive the RX esp32: https://github.com/jeanlemotan/esp32_bridge_broadcast

from esp32_bridge_broadcast.

BTW: As far as i know ,almost all the cards which has monitor mode doesn't meet 35Mbps dada transfer speed.
There is also a paper to compare some cards' injection rate :
Analysis of Injection Capabilities and Media Access of IEEE 802.11 Hardware in Monitor Mode
However the paper was written in 2014 and may be outdated for some new rtl and intel cards.
Anyone knows what is the speed SOTA in 2023?If they do have a poor rate .It’s time for ESP32.
The ESP32 allows us to do better ,cheaper and more freedom.

from esp32_bridge_broadcast.