bun-pm-version: add page

[msaf9]

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): 1.3.3
• Reference issue: #

[Copilot]

Pull request overview

This PR adds documentation for the bun pm version command, which provides utilities for managing the version field in package.json files using Bun's package manager. The command supports displaying the current version, setting specific versions, bumping semantic version levels (major, minor, patch, premajor, preminor), and syncing versions from Git tags.

• Adds comprehensive documentation for Bun's version management command
• Includes 8 common use cases covering all version manipulation scenarios
• Follows tldr style guidelines and is consistent with existing Bun command pages

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