refactor: 抽取命令上下文匹配公共逻辑

[Particaly]

复用已有的cmd匹配逻辑，解决部分插件在全局快捷键开启自动复制时，错误匹配到低优先级的指令问题

[gemini-code-assist]

Code Review

This pull request refactors and consolidates command context matching logic (for regex, over, files, and window commands) into a new shared utility file src/shared/commandContextShared.ts, updating both the main API manager and the renderer's command data store to use these standardized functions. It also adds a comprehensive test suite for the shared matching utilities. The review feedback highlights two critical compatibility issues where refactoring to parseMatchPattern without enabling allowPlainString breaks window title matching for plain string patterns that do not use the standard /pattern/flags format.

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