Switch to pioarduino platform and add proper solo1 support

[iranl]

Description:

• Switch to pioarduino platform /~https://github.com/pioarduino/platform-espressif32
• Add proper Solo1 support (using same Arduino core 3.0.4 and ESP-IDF 5.1.4 as the other variants)

Checklist:

• The pull request is done against the latest master 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
• I accept the CLA.

[Jason2866]

You are fast :-) You should remove the extra Ethernet lib. Arduino has its own well working one which does not have SPI conflicts as the universal Arduino Ethernet lib.

[iranl]

You should remove the extra Ethernet lib. Arduino has its own well working one which does not have SPI conflicts as the universal Arduino Ethernet lib.

Fully agree, but will take some more effort to remove our dependencies on the old lib