Complete HTTP data source tutorial with full working example

[Copilot]

The HTTP data source tutorial (docs/tutorials/http.md) was incomplete, ending abruptly after the "Register the block" section with only a brief mention of following another example.

Changes

Added missing sections and complete working code example to match structure of other tutorials (Airtable, Google Sheets, Shopify):

• Register the block - Added complete working code example showing:
  • How to load data source by UUID using HttpDataSource::from_uuid()
  • Full query definition with input_schema, endpoint function, and output_schema
  • Complete register_remote_data_block() call with render_query
  • Clear explanation of what each part does
• Insert the block - Instructions for using the block in the WordPress editor
• Patterns and styling - Links to pattern documentation and theme customization
• Code reference - Points to rest-api-block-from-ui-data-source example template

The code example is based on the zip-code-block and uses the Zippopotam.us API, providing a complete end-to-end working tutorial that users can follow to create their own HTTP data source blocks.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Finish HTTP data source tutorial</issue_title>
<issue_description>The "Create a remote data block using an HTTP data source" tutorial in the docs is incomplete.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Finish HTTP data source tutorial #710

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[maxschmeling]

@copilot this still skips over the creation of a query. It should at least show a render query and how to add that. Without a query, you can't add a block for HTTP because RDB doesn't know what to generate. Include an example that will work end to end (for a fictional API).

[Copilot]

@copilot this still skips over the creation of a query. It should at least show a render query and how to add that. Without a query, you can't add a block for HTTP because RDB doesn't know what to gen...

Added complete query example with input_schema, output_schema, endpoint function, and register_remote_data_block call. The code matches the zip-code-block example pattern and will work end-to-end for the Zip code API. See commit aed3a15.