Backend-ai-manager

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**FIX**

- Revert authorization in terminal pty streaming due to regression.

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**NEW**

- Add support for the batch-mode API with compiled languages such as
C/C++/Java/Rust.

- Add support for the file upload API for use with the batch-mode API.
(up to 20 files per request and 1 MiB per each file)

**IMPROVEMENTS**

- Upgrade aiohttp to v2.2.0.

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- Make the list of GPU instances configurable.
(Later, this will be automatically detected without explicit configurations)

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- Add support for PyTorch kernels.

- Fix continuous API failures when faulty agents wrongly reports their status.

- Upgrade aiohttp to v2.

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- Improve packaging: auto-converted README.md as long description and unified
requirements.txt and setup.py dependencies.

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- Fix internal API mismatch bug in web termainl.