feat: add Run Script command for script files in editor

[xielixing]

Summary

Adds a Run Script command that detects the script language of a file and executes it in a new terminal session. This implements the feature requested in #1566.

Changes

• New file: \RunScriptCommand.ts\ — Implements the \ile.run-script\ context menu command:
  • Maps file extensions to interpreters via language detection (Python, JavaScript, TypeScript, Shell, PowerShell, Batch, Ruby, Go, Rust, PHP, Lua, Perl)
  • Creates a terminal session, sends the run command, and opens the terminal panel
  • Disabled for remote workspaces and non-file URI schemes
• Tab.tsx — Adds a \Run Script\ context menu item in the editor tab, shown only when the file has a recognized interpreter
• file/index.ts — Registers \RunScriptCommand\ in the builtin file commands
• i18n — Adds
  unScript,
  unScriptDescription,
  unScriptStarting,
  unScriptSessionName\ keys and
  unScriptFailed,
  unScriptUnsupported\ error keys for en-US, zh-CN, zh-TW

Validation

• TypeScript/esbuild compile check passed (no errors in changed files)
• JSON locale files validated (valid syntax, key parity across en-US/zh-CN/zh-TW)
• i18n key parity check passed (all keys present in all 3 locales)

Closes #1566