docs: user guide

[jacque1ine]

No description provided.

[KeranYang]

Thank you @jacque1ine for writing detailed user guide. Just a few high level suggestions - 1. we now have two user guides, one is the README.md and this one. Let's keep using README.md as the guide and change this one to something like running pulsar on StreamNative. 2. we already have two folders, one for source and one for sink. User should always go to one of them for creating a pipeline. I see that in both files, we have a section to Have a Pulsar cluster running, can we have change this PR to setup StreamNative on the Have a Pulsar cluster running section, and then update the following steps to add auth? Basically merge user guide to source and sink guides.

[Copilot]

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docs/source/byte-array/manifests/api-key/byte-arr-consumer-pipeline.yaml:4

• The pipeline is defined in a consumer context but is named 'raw-producer-pipeline'. Consider renaming it to 'raw-consumer-pipeline' (or similar) to accurately reflect its purpose.

  name: raw-producer-pipeline