PlatformIO CI in Github with web flasher

[geertroumen]

When working on embedded projects with multiple people or in different places it can be useful to have people update the esp32 through some kind of web based tool. ESPtool.js is great for this. What I figured out is that I than always needed to bundle the correct bin files with some html file to share with people.

So I automated this; which might be useful for:
- People who want to quickly test some library or tool to see if it and how it works on their hardware. <- first poc to triage if it is worth investing time in this library.
- People who are more end-users, and don't want to change the source code beyond just simple password and wifi ssid. <- Simple home automation stuff
- People who currently don't have a device with platformio installed. <- Installing pulling and compiling any random sketch on a new laptop takes time.

How it works is that any library on github an have an associated github action, this will create a github page with all the compiled binaries ready to flash to the esp.

This library for example:
https://github.com/lemio/esp32_PoweredUp/tree/master

Then generates this page that people can visit to test the examples:
https://lemio.github.io/esp32_PoweredUp/

I'm curious to learn if this is useful for you and if it needs any changes. The source code for the automation is here:
https://github.com/lemio/ESP32-S3-Flash ... ble-action