Improve clarifai pipeline init help and post-init next-steps message

[christineyu123]

Rewrites the post-init "Next steps" output and the clarifai pipeline init --help
text for --template / --set so users see the verified flow: cd into the
generated folder, clarifai pipeline upload, then clarifai pipeline run with
either --instance= or --nodepool_id + --compute_cluster_id, plus repeated
--set key=value for runtime parameter overrides.

[github-actions]

Package	Line Rate	Health
clarifai	45%	❌
clarifai.cli	63%	➖
clarifai.cli.templates	67%	➖
clarifai.cli.templates.toolkits	100%	✔
clarifai.client	64%	➖
clarifai.client.auth	67%	➖
clarifai.constants	100%	✔
clarifai.datasets	100%	✔
clarifai.datasets.export	69%	➖
clarifai.datasets.upload	75%	➖
clarifai.datasets.upload.loaders	37%	❌
clarifai.models	100%	✔
clarifai.rag	0%	❌
clarifai.runners	52%	➖
clarifai.runners.models	61%	➖
clarifai.runners.pipeline_steps	45%	❌
clarifai.runners.pipelines	77%	➖
clarifai.runners.utils	61%	➖
clarifai.runners.utils.data_types	72%	➖
clarifai.schema	100%	✔
clarifai.urls	58%	➖
clarifai.utils	62%	➖
clarifai.utils.evaluation	16%	❌
clarifai.workflows	95%	✔
examples	64%	➖
Summary	61% (12512 / 20577)	➖

Minimum allowed line rate is 50%