Support for I2C over Serial

[s-hadinger]

Description:

I2C Serial is now fully functional. This PR supersedes #22388

Documentation for SeedStudio SenseCap D1 will be added shortly. It now allows to use the SDC40/SGP40 sensors connected to RP2040 via serial:

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.0.241030
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass