Add support for Primeintellect cloud provider

[pokgak]

WIP for adding new Primeintellect cloud provider to skypilot. Primeintellect aggregates GPUs from all providers and provide a unified interface to manage your GPUs across clouds.

So far I've followed the guideline and added necessary code to my fork. Some of the code I've copied from other recently added providers like RunPod and modified to call Primeintellect APIs instead.

Tested (run the relevant ones):

• Code formatting: install pre-commit (auto-check on commit) or bash format.sh
• Any manual or new tests for this PR (please specify below)
• All smoke tests: /smoke-test (CI) or pytest tests/test_smoke.py (local)
• Relevant individual tests: /smoke-test -k test_name (CI) or pytest tests/test_smoke.py::test_name (local)
• Backward compatibility: /quicktest-core (CI) or pytest tests/smoke_tests/test_backward_compat.py (local)

[pokgak]

current state: I can run sky check successfully and it detects the Primeintellect cloud but when I ran sky launch it returns a NotImplementedError which is weird since I already implemented the run_instances interface.

[Michaelvll]

current state: I can run sky check successfully and it detects the Primeintellect cloud but when I ran sky launch it returns a NotImplementedError which is weird since I already implemented the run_instances interface.

Thanks for submitting the PR @pokgak! You may want to try export SKYPILOT_DEBUG=1 when your run sky launch to see the stack trace of the exception raised

[pokgak]

i'm seeing the file now where its executing. thanks! i think i can get started with that.