Update packages to latest version

[TonyStef]

Feature request

Add the ability to update individual packages to their latest version.

Details

• Show an "Update" action on packages where installed != latest
• Map to the correct CLI command per manager:
  • brew upgrade <pkg>
  • npm update -g <pkg>
  • pip3 install --upgrade <pkg>
  • bun update -g <pkg>
  • cargo install <pkg> (reinstalls latest)
• Bulk update option: "Update all" for packages with available updates
• Progress indicator during update
• Auto-rescan after update completes

Depends on

• Requires update checking (Check for available updates via registry APIs #3) to know which packages have newer versions