LFX Workspace: Integrate burn.rs as a new WASI-NN backend about wasmedge HOT 4 OPEN

Please notice that we are using wasmedge-wasi-nn, which is forked from wasi-nn with some LLM-required extensions
You can focus on the original wasi-nn spec first because our modification extends the original spec. Once finishing the basic features, you can move forward to support the whole wasmedge-wasi-nn extensions.

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ok, i have added the wasmedge-wasi-nn to the plan.

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week1 update:
After discussing with mentor, the following viewpoints were obtained:

• Plug-in development will only focus on inference.
• Plug-in development don't need no_std, only support native platform.
• Plug-in development should focus on how to encapsulate the contents of burn.rs into the form required by wasmedge-wasi-nn
• burn.rs may have provided some similar data structures like wasi-nn.

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