Remove stale config entry before deploy

[DaniusKalv]

Summary

• Remove the overwritten config block from disk just before deploy, so ssh no longer resolves the typed host through stale HostName and earlier aborts (tool checks, keygen) leave the config untouched (closes Stale config entry redirects deploy after reflash #6)
• Patch USERPROFILE in remove_entry tests so they stay inside tmp on Windows (Path.home() ignores HOME there)
• Align --help example descriptions into one column and describe flags example
• Polish PyPI metadata: ssh-copy-id alternative in summary, more keywords, sidebar links, Production/Stable status
• Polish README: bold hero tagline, scope zero dependencies claim to Python
• Bump version to 1.1.1

Test plan

• Reproduce the reflash scenario: overwrite a managed alias whose stored HostName no longer resolves, deploy now connects to the typed host