Add support for Low Power core of the ESP32C6 about arduino-esp32 HOT 4 OPEN

@sudeep-mohanty - Let talk about how to move forward with C6 LP support for Arduino IDE.

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I have requested that this be added to the compiled sdk. Note that the LP-core is a RISC-V arch, and will is expected to be programmed in C, not assembly. I will test later today or tomorrow to see if this is even possible using the S3. IIRC, there is a 2-pass compile, and in esp-idf the ulp code gets compiled down and included as an asm blob. If that is the case, the arduino compiler probably will not be able to program the ulp properly.

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It's not yet possible, but we will revisit it later. For now only the FSM ULP can be used (where available)

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@rrrus @lbernstone
This is possible by using Arduino as IDF component.
The IDF tools and building process will be available, making it feasible.

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