docs: document reviewed Experience and Skill workflows

[chenncy]

Part of #1226

Summary

• Add synchronized English and Chinese Candidate Review how-to guides.
• Explain the Experience and managed Skill lifecycle and review boundary.
• Document Experience generation, review, replacement, and scheduled incubation.
• Document managed Skill generation, review, exact reads, evolution, and Codex export.
• Move procedural guidance out of interface and configuration reference pages.
• Update English and Chinese documentation navigation.

Validation

• .\.venv\Scripts\zensical.exe build -s
• git diff --check
• Verified commands and behavior against the CLI, OpenAPI, Python Client, Runtime, MCP, and tests.

AI usage

Used the documentation-writer and humanizer skills to draft and edit the documentation. The author manually reviewed the final content.

[Copilot]

Pull request overview

Adds new, synchronized English and Chinese documentation that explains and operationalizes the Candidate review workflow plus the Experience / managed Skill lifecycle, while trimming procedure-heavy content from the reference pages and updating site navigation accordingly.

Changes:

• Add new how-to guides for reviewing Candidates, creating/reviewing Experiences, and creating/exporting managed Skills (EN + ZH).
• Add new explanation pages describing the Experience/Skill evidence → Candidate → Revision lifecycle (EN + ZH).
• Update nav + index pages, and refactor reference docs to link to the new how-to pages.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
zensical.toml	Adds the new EN/ZH pages to the documentation navigation.
docs/en/docs/index.md	Adds new “Experience/Skill lifecycle” and workflow entry points to the EN docs landing page.
docs/zh/docs/index.md	Adds new “Experience/Skill lifecycle” and workflow entry points to the ZH docs landing page.
docs/en/docs/reference/interfaces.md	Moves Candidate procedure out; links to the new how-to and lifecycle explanation.
docs/zh/docs/reference/interfaces.md	Moves Candidate procedure out; links to the new how-to and lifecycle explanation.
docs/en/docs/reference/configuration.md	Refactors incubation guidance to point to the new how-to.
docs/zh/docs/reference/configuration.md	Refactors incubation guidance to point to the new how-to.
docs/en/docs/how-to/review-candidates.md	New EN how-to: list/inspect/revise/approve/reject Candidates and verify outcomes.
docs/zh/docs/how-to/review-candidates.md	New ZH how-to: list/inspect/revise/approve/reject Candidates and verify outcomes.
docs/en/docs/how-to/create-and-review-experience.md	New EN how-to: generate Experience Candidates, review, verify, replace, and schedule incubation.
docs/zh/docs/how-to/create-and-review-experience.md	New ZH how-to: generate Experience Candidates, review, verify, replace, and schedule incubation.
docs/en/docs/how-to/create-and-export-skill.md	New EN how-to: generate/review Skill Candidates, exact reads, export to Codex, and evolve via usage.
docs/zh/docs/how-to/create-and-export-skill.md	New ZH how-to: generate/review Skill Candidates, exact reads, export to Codex, and evolve via usage.
docs/en/docs/explanation/experience-and-skill-lifecycle.md	New EN explanation: evidence/Candidate/versioning/Revision lifecycle and boundaries.
docs/zh/docs/explanation/experience-and-skill-lifecycle.md	New ZH explanation: evidence/Candidate/versioning/Revision lifecycle and boundaries.

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