Add sublime-run-command package

[randolph555]

• I'm the package's author and/or maintainer.
• I have read the docs.
• I have tagged a release with a semver version number. (v1.0.0)
• My package repo has a description and a README describing what it's for and how to use it.
• My package doesn't add context menu entries. *
• My package doesn't add key bindings. **
• Any commands are available via the command palette.
• Preferences and keybindings (if any) are listed in the menu and the command palette, and open in split view.
• If my package is a syntax it doesn't also add a color scheme.
• I use .gitattributes to exclude files from the package.

*Context menu: Only adds one "Execute Command" entry for running selected text as shell command.

**Key bindings:

• macOS: Cmd+Enter (run command), Ctrl+Tab (history complete)
• Linux: Ctrl+Enter (run command), Ctrl+Tab (history complete)

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My package is similar to Terminus, however it should still be added because:

1. Lightweight - No terminal panel, executes commands directly in the editor
2. Inline output - Command output appears right below the command line
3. Streaming output - Real-time output display, doesn't block the editor
4. Pipe support - Select text + |command to pipe content to shell commands
5. History autocomplete - Auto-complete from command history
6. Dangerous command protection - Confirms before running rm -rf, sudo rm, etc.

This is useful for quick command execution without leaving the editor context.