Add wheel info subcommand

[killerdevildog]

Implements GitHub issue #639: Add wheel info subcommand to display metadata about wheel files without unpacking them.

Features:

• Shows package name, version, and build information
• Displays wheel format version and generator
• Lists supported Python versions, ABI, and platform tags
• Shows package metadata (summary, author, license, classifiers)
• Displays dependencies and file count/size information
• Optional verbose mode with detailed file listing
• Comprehensive error handling for missing files

Changes:

• Add src/wheel/_commands/info.py with main implementation
• Update src/wheel/_commands/init.py to register new command
• Add tests/commands/test_info.py with comprehensive test coverage
• Add docs/reference/wheel_info.rst with usage documentation
• Update docs/reference/index.rst to include new command docs
• Update docs/user_guide.rst with info command examples
• Update docs/manpages/wheel.rst with info command reference

Addresses #639 See #639