docs(wikg): add .wikg archive standard

[Moskize91]

Summary

• add a public .wikg archive standard covering ZIP layout, required and optional entries, cover handling, compatibility, and versioning
• link the standard from the English and Chinese README agent sections

Verification

• pnpm run lint:fix

[coderabbitai]

Walkthrough

Adds docs/wikg-standard.md, documenting the .wikg ZIP archive layout, required and optional entries, manifest and SQLite contracts, validation, extraction safety, compatibility behavior, semantic layers, and versioning rules. Updates the English and Chinese READMEs with links to this standard.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title follows the required type(scope): subject format and clearly matches the documentation-focused change.
Description check	✅ Passed	The description summarizes the new .wikg standard and README links, which are directly related to the changeset.

✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch codex/wikg-standard-doc

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/wikg-standard.md`:
- Around line 47-62: Align the `.wikg-mutation-token` contract by updating the
reader’s parsing logic to require the exact two-line UTF-8 payload with a
trailing newline, matching `docs/wikg-standard.md`; alternatively, if preserving
the current reader behavior, revise the specification to allow payloads without
the trailing newline. Keep token validation and archive mutation handling
unchanged.

In `@README.md`:
- Around line 278-279: Align the `.wikg` Archive Standard link descriptions in
README.md lines 278-279 and README_zh-CN.md lines 278-279 with the standard’s
actual scope by removing the unsupported URI and automation rules references, or
add corresponding sections to the standard documentation if that is intended.
Apply the same scope correction consistently in both English and Chinese
descriptions.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 10231efc-62e4-4593-a456-2f33df10ca5c

📥 Commits

Reviewing files that changed from the base of the PR and between 0352f95 and 990cbdf.

📒 Files selected for processing (3)

• README.md
• README_zh-CN.md
• docs/wikg-standard.md