Add support for ESP32-C61 as target device (ESF-251)

[Jeija]

Description

I wanted to use esp-serial-flasher with the new ESP32-C61 as a target device and realized that the library has not yet been updated to include support for that. I added the required code and binaries.

Testing

• Only tested with ESP32 as host device and ESP32-C61 as target
• Only tested with UART interface using the two example apps:
  • examples/esp32_example: Writes "Hello world" app to flash via UART
  • examples/esp32_load_ram_example: Loads "Hello world" app to RAM

It works fine under these tested configurations.

I have not tested any other configurations (different host microcontrollers, interfaces other than UART), but wanted to leave this here maybe as a starting point for future work.

[github-actions]

	Messages
📖	🎉 Good Job! All checks are passing!

👋 Hello Jeija, we appreciate your contribution to this project!

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[Dzarda7]

Hello @Jeija, very nice, thanks, interesting, I thought there is no way to get a hands on ESP32-C61 😄 . We plan to remove the example binaries for all the chips, so if you are okay with that, I would like to merge this after the change (week or two I believe). If you want this ASAP, we can do that, but seems like you are not in a hurry. Would you be okay with modifying this PR after the change so you have all the credit you deserve for this PR or you want us to finis this? I believe only small changes would be necessary.

[Jeija]

Hi @Dzarda7, I can just use my own fork of esp-serial-flasher in the meantime, so there is no rush in getting this upstream. Feel free to add support for ESP32-C61 after the change, I don't really care about getting credit for this commit. But I'd also be fine with modifying this PR and to test it on my hardware if that is easier for you. Basically I don't care either way as long as support for the ESP32-C61 ends up in esp-serial-flasher at some point 😉

[Dzarda7]

Thanks @Jeija, I will let you know. All the new chips are planned to be supported.