* updated arduinojson to version 7.3.0, enabled comments within json files
* update ESPAsyncWebServer/AsyncTCP to the ESP32Async fork
ESP32Async/ESPAsyncWebServer and ESP32Async/AsyncTCP are much better maintained and it looks like a lot of bugs are fixed compared to the ESPHome version we used before.
* Arduino 3.x compatibility (while maintaining 2.x compatibility)
- added webinterface for tag flasher
- added tcp transport for communicating with tag flasher (OTG USB also still works)
- added content 'timestamp', makes use of preloaded images and buttons on the 2.9" M3
- webinterface is now aware of C6 and flasher capabilities
- AP can run without ieee801.15.4 radio (i.e. flasher only) by shorting FLASHER_AP_TXD and FLASHER_AP_RXD
- added tcp transport option to OEPL-Flasher.py (serial also still works)
- added new environment OpenEPaperLink_Mini_AP_v4
- lots of finetuning and bug fixes
- neopixel patterns optimized. The 'breathing' led state now is green colored if everything is okay, and blue if there are one or more tags timed out.
- time zone is now set before wifi connect to show correct time zone in the logs during startup
- concurrent image upload POST is now blocked. If an upload is in progress while you do a second http POST, http status 409 Conflict is returned.
- small synchronisation bug fix in web interface on loading tag type
- dialog window close bugfix in painter
- image upload is now logged in /log.txt
- neopixel idle color now represents AP status
- option to invert colors (advanced options at tag card)
- filename dropdown in tag card when a filename is expected
- redrawing pending instead of raw, if previews are off and tag reboots
- tft brightness setting independent from neopixel brightness
- disable useless compiler warnings in fastled and tft_espi
- web preview thumbnail fix
- faster tag updates while webpage is displayed
- fixed tag fw ota update
