docs(changelog): sync full changelog from tego-standard

[baizixv]

Automatically sync full changelog files from tego-standard repository to ensure consistency. This PR overwrites the changelog files in docs repository with the complete changelog from tego-standard repository.

Summary by CodeRabbit

Release Notes

• Documentation
  • Updated changelog to document version 1.6.6 release, including a resolved issue with database-clean functionality.
  • Updated release comparison links and added new version tag reference for v1.6.6 in both English and Chinese documentation.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

Updates the English and Chinese changelogs to document version 1.6.6 release with a database-clean bug fix. Modifies comparison anchors from previous versions to v1.6.6 and adds corresponding release links.

Changes

Cohort / File(s)	Summary
Changelog Updates docs/en/changelog/changelog.md, docs/zh/changelog/changelog.md	Add new v1.6.6 release entry with bug fix details; update Unreleased comparison links from previous version to v1.6.6; add new release link anchors for v1.6.6

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• docs(changelog): sync full changelog from tego-standard #195: Adds the Unreleased plugin-database-clean items that this PR formalizes into the v1.6.6 release entry.
• docs(changelog): sync full changelog from tego-standard #186: Modifies the same changelog files to update release entries and version comparisons.
• docs(changelog): sync full changelog from tego-standard #192: Syncs Unreleased changelog entries; relates to the version anchoring updates in this PR.

Poem

🐰 A version hops into view,
One point six point six is new!
With database fixes clear,
The changelog's here!
Released with precision true! ✨

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📜 Recent review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between a1645f0 and 09b8ecf.

📒 Files selected for processing (2)

• docs/en/changelog/changelog.md
• docs/zh/changelog/changelog.md

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