For easy initial flashing. Flashing at address 0x0 with esptool.py
Generated in folder `.pio..../firmware-factory.bin` (Not used at the moment!)
## Checklist:
- [x] The pull request is done against the latest development branch
- [x] Only relevant files were touched
- [x] Only one feature/fix was added per PR and the code change compiles without warnings
- [x] The code change is tested and works with Tasmota core ESP8266 V.2.7.4.9
- [x] The code change is tested and works with Tasmota core ESP32 V.2.0.2
- [x] I accept the [CLA](https://github.com/arendst/Tasmota/blob/development/CONTRIBUTING.md#contributor-license-agreement-cla).
_NOTE: The code change must pass CI tests. **Your PR cannot be merged unless tests pass**_
Jason2866