[ADDONS] Add licence and notice for torch-c-dlpack-ext

[cyx-6]

This PR adds the license and notice for torch-c-dlpack-ext to align with tvm ffi

[gemini-code-assist]

Summary of Changes

Hello @cyx-6, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request standardizes the licensing for the torch-c-dlpack-ext addon by integrating the Apache License 2.0 and a corresponding NOTICE file. These changes ensure legal compliance and align the project's licensing with the TVM FFI, while also updating the build configuration to properly package these new legal documents.

Highlights

• License Addition: The full text of the Apache License, Version 2.0, has been added for the torch-c-dlpack-ext component.
• Notice File Introduction: A new NOTICE file has been created for torch-c-dlpack-ext, attributing copyright to The Apache Software Foundation.
• Project Metadata Update: The pyproject.toml file has been updated to declare the Apache 2.0 license, specify authors, add classifiers, and ensure the new license and notice files are included in the package distribution.

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[gemini-code-assist]

Code Review

This pull request adds the LICENSE and NOTICE files for the torch-c-dlpack-ext addon and updates pyproject.toml to include them in the package. The changes are good for license compliance. I have a few suggestions to improve the packaging configuration in pyproject.toml to follow setuptools best practices and a correction for the LICENSE file content to keep it clean.