Added support for streaming responses to HTTP requests using SSE

We've added functions that let you respond to HTTP requests using server-sent events—see the Http.ServerSentEvents module. Use Start SSE Response to begin a streamed response, and follow up with messages using Send SSE Event.

Misc

• Traces now show a hierarchical relationship equivalent to the parent/child relationship of their processes.
• Adds button to copy message on notifications
• Can click on shadow nodes (nodes that blink when highlighted in the Node palette) to place them in the editor.
• Includes 'text' as keyword for Data string. If you search for 'text' in the Node palette, Data string will now show up.
• Made the 'add panels' button show a context menu with a multi-select list.
• Adds option to edit name of secrets/environment variables.
• Reworked 'convert to function' implementation to be more robust.

Std lib

• Added support for XML and YAML
• Added Http Body Encode Multipart FormData and some helper functions for encoding fetch bodies as multipart/form-data.
• Added a streaming version of llm.Chat.Complete - llm.Chat.CompleteStreamed, along with a function to read tokens one at a time - llm.Chat.NextEvent
• Added functions for responding to http requests using server-sent events.
• Made Http Parse SSE Stream a lot more complete and easier to use - this function lets you consume web APIs using server-sent events.

Breaking changes

• Removed triggers from Std.Generate UUID - If you've used this function, you need to update your code.

Bugs

• Fixed bug where non-ascii header values were not correctly handled.
• Fixed bug where OpaqueValues were not summarized correctly as Object values.
• Fixed bug where zooming over comments did not work.
• Fixed bug where shadow nodes were sometimes not visible when opening the Node palette.