docs: add B200/H-series GPU hardware support information (#380)

* docs: add B200/H-series GPU hardware support information

- Add hardware support section to both English and Chinese quick start guides
- Clarify B200 series is fully supported with same steps as H-series
- Explain Docker image compatibility for both GPU types
- Note CI protection status differences between H and B series
- Reference issue: https://github.com/zhaochenyang20/Awesome-ML-SYS-Tutorial/issues/211

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Co-Authored-By: Claude <noreply@anthropic.com>

* docs: fix GPU model from H800 to H200

- Correct H-series GPU model from H800 to H200 in both languages
- Update both English and Chinese quick start guides

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Co-Authored-By: Claude <noreply@anthropic.com>

* docs: remove open source project note and feedback text

- Remove note about slime being open source project
- Remove encouragement for B200 issue feedback
- Keep content more concise and professional

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Co-Authored-By: Claude <noreply@anthropic.com>

* docs: remove redundant section headers

- Remove '其他环境选项' / 'Alternative Environment Options' section headers
- Keep the content but integrate directly into hardware support section

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Co-Authored-By: Claude <noreply@anthropic.com>

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Co-authored-by: Claude <noreply@anthropic.com>