NocoBase v2.1.2: Added an external vector store configuration form for AI knowledge bases

[AI employees] Added an external vector store configuration form for AI knowledge bases. (#9723) by @cgyrock
[AI: Knowledge base] Added an external vector store configuration form for AI knowledge bases. by @cgyrock

[undefined]
- Added a version control scenario to the AI builder quick start (#9748) by @Molunerfinn Reference: AI Builder Quick Start
- Improved the version control documentation with AI Builder automatic revision guidance. (#9745) by @cgyrock
[cli] clarify init setup wording (#9750) by @chenos
[Action: Import records] Improved import and async task error dialogs so long error messages can be fully read without breaking the layout. (#9746) by @katherinehhh
[Action: Import records Pro] Improved import dialogs so long error messages remain readable and v2 processing mode can be selected directly from the settings menu. by @katherinehhh

[client-v2] Fixed the issue where v2 pages could keep loading after signing in (#9738) by @zhangzhonghe
[cli] require Node.js 22 for nb (#9749) by @chenos
[File manager] Fix PDF previews missing CJK/CID font text after switching to pdf.js. (#9737) by @mytharcher