imp: add page

[cerebrate]

Checklist

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR contains at most 5 new pages.
• The PR is authored by me, or has been human-reviewed if it was created with AI or machine translation software.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known): 1.0

[Copilot]

Pull request overview

This PR adds a new tldr-pages documentation page for the imp command, which is the bottle-imp tool — a helper utility for using native systemd support under WSL (Windows Subsystem for Linux). It serves as a sibling page to the existing genie.md, covering the successor tool from the same arkane-systems project.

Changes:

• Adds a new pages/linux/imp.md page documenting the four main imp subcommands: initialize, shell, command, and shutdown.

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