[DO NOT MERGE] Add hyp create ray-dashboard-connection command

[jchatter321]

Adds a CLI command to create a RayDashboardConnection CR and return the dashboard URL.

Usage:

hyp create ray-dashboard-connection --cluster-name <name> --namespace <ns>

Returns the connection URL from the operator's extension API. Flag --namespace defaults to default namespace if not provided.

Testing

Installed CLI with pip install -e . and successfully generated a RayDashboardConnection using hyp create ray-dashboard-connection --cluster-name my-raycluster.

Unit tests -

dev-dsk-jdchatte-2a-4e225af8 % python -m pytest test/unit_tests/cli/test_ray_dashboard_connection.py -v

✓ hyperpod-cluster-stack-template installed successfully from local directory
==================================== test session starts =====================================
platform linux -- Python 3.12.11, pytest-8.3.2, pluggy-1.6.0 -- /home/jdchatte/.local/share/mise/installs/python/3.12.11/bin/python
cachedir: .pytest_cache
rootdir: /local/home/jdchatte/sagemaker-hyperpod-cli
configfile: setup.cfg
plugins: cov-5.0.0, anyio-4.14.2, order-1.3.0, hydra-core-1.3.2, dependency-0.6.0
collected 8 items                                                                            

test/unit_tests/cli/test_ray_dashboard_connection.py::TestRayDashboardConnectionCommand::test_create_success_returns_url PASSED [ 12%]
test/unit_tests/cli/test_ray_dashboard_connection.py::TestRayDashboardConnectionCommand::test_create_default_namespace PASSED [ 25%]
test/unit_tests/cli/test_ray_dashboard_connection.py::TestRayDashboardConnectionCommand::test_create_empty_url_raises_error PASSED [ 37%]
test/unit_tests/cli/test_ray_dashboard_connection.py::TestRayDashboardConnectionCommand::test_create_no_status_raises_error PASSED [ 50%]
test/unit_tests/cli/test_ray_dashboard_connection.py::TestRayDashboardConnectionCommand::test_create_404_api_not_installed PASSED [ 62%]
test/unit_tests/cli/test_ray_dashboard_connection.py::TestRayDashboardConnectionCommand::test_create_404_namespace_not_found PASSED [ 75%]
test/unit_tests/cli/test_ray_dashboard_connection.py::TestRayDashboardConnectionCommand::test_create_403_raises_exception PASSED [ 87%]
test/unit_tests/cli/test_ray_dashboard_connection.py::TestRayDashboardConnectionCommand::test_missing_cluster_name PASSED [100%]<unknown>:33: SyntaxWarning: invalid escape sequence '\/'

[psnilesh]

This can never happen because agg APIs are sychronous. Lets fail with an error message 'contact your administrator' or something when URL is null / empty.

[jchatter321]

Added exception.

[psnilesh]

Can we handle the case where the ray endpoint operator is not installed gracefully? If kind RayDashboardConnection is not recognized by the API server, lets instruct customers to install ray-endpoint-operator (we'll come back and link the docs when it's ready)

[jchatter321]

Added exception below.

[zhaoqizqwang]

Did we update the help message or add documentation for this new command: ray-dashboard-connection?

[jchatter321]

Did we update the help message or add documentation for this new command: ray-dashboard-connection?

We plan to release public documentation containing this information.