Add comprehensive ExtensionView documentation with proper i18n separation (#36)

* Initial plan

* Add comprehensive bilingual documentation for ExtensionView in GeneralUpdate.Tools

Co-authored-by: JusterZhu <11714536+JusterZhu@users.noreply.github.com>

* Create English-only i18n version of GeneralUpdate.PacketTool.md

Co-authored-by: JusterZhu <11714536+JusterZhu@users.noreply.github.com>

* Fix bilingual content issues in Chinese source file

Co-authored-by: JusterZhu <11714536+JusterZhu@users.noreply.github.com>

* Add Chinese version to zh-Hans i18n directory

Co-authored-by: JusterZhu <11714536+JusterZhu@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: JusterZhu <11714536+JusterZhu@users.noreply.github.com>

Author: Copilot