docs: add shared EverMind ecosystem

[Yangtze-Seventh]

Summary

• Replace the previous project link lists with the shared EverMind ecosystem tables from EverOS.
• Keep the English and Chinese README sections aligned above their contributing sections.

Type

• Fix
• Feature
• Docs
• CI / tooling
• Refactor
• Other

Verification

No runtime commands were run because this is a documentation-only change. Both README files were checked for one ecosystem section, exact shared table content, and valid placement.

• Relevant tests pass locally
• Relevant lint / type checks pass locally
• User-facing docs or screenshots are updated when needed

Risk

• Security impact considered
• Backward compatibility considered
• Rollback path is clear for risky changes

Related Issues

N/A

[gloryfromca]

No blockers; this can merge as far as I am concerned.

I reviewed git diff github/main...HEAD after refreshing the target ref, the surrounding README sections, commit history, AGENTS.md/CLAUDE.md and the context glossary, the canonical EverOS ecosystem tables and all new link targets, backward compatibility, and test integrity. The English and Chinese sections stay aligned, all repository and plugin links resolve, and no tests or runtime code were changed or weakened.

Verification:

• git diff --check github/main...HEAD: passed.
• README-specific pre-commit hooks: passed.
• Commit-message, PR-title, and large-file checks: passed.
• uv run pytest: 6719 passed, 43 skipped, 4 failed, and 2 errors before exiting 139. Five affected tests passed in an isolated rerun and had failed because the full process exhausted file descriptors. One untouched, pre-existing Rich-theme assertion remained failing; the focused rerun was 7 passed and 1 failed and also exited 139 during teardown. None of these failures is connected to this documentation-only diff.