Add readme.md to ai branch

[Copilot]

Copies src/ai/readme.md from main branch to ai branch. The file documents GPT-Vis 1.0's vision, core philosophy, and contribution policy.

Changes

• Added src/ai/readme.md (37 lines) containing:
  • Vision: AI-first visualization, technology-agnostic approach, unified gateway to AntV libraries
  • Release schedule: v1.0 stable on March 21, 2026
  • Contribution policy: AI-generated code only

Original prompt

https://github.com/antvis/GPT-Vis/blob/main/src/ai/readme.md 这个文件放到 ai 分支对应的目录中。

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[github-actions]

🎊 PR Preview 36ef72a has been successfully built and deployed to https://antvis-GPT-Vis-preview-pr-283.surge.sh

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🎊 PR Preview 36ef72a has been successfully built and deployed to https://antvis-GPT-Vis-preview-playground-pr-283.surge.sh

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