Feat tauir

[lloydzhou]

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The fetchSSE mentioned yesterday, I tried it last night, and it can be implemented by improving the official http plugin:

1. Let fetch_read_body support multiple reads
2. Improve js sdk, first use readableStream to generate Response, and then call fetch_read_body multiple times to read data and write it into Response.body

The effect was tested in tauri's dev mode (the current rust plugin has not been changed, and the first read is to read the chunk and get the complete content)

[lloydzhou]

move to #5565