v1.28.0

• combine ggman web and ggman url into a single command
  • add --url to differentiate behavior
  • make url and alias of the web --url for backward compatibility
  • add --ref flag to override ref being passed
• combine ggman ls and ggman lsr into a single command
  • add --remote and --canonical flags
  • add --json flag to produce json output
  • add --export to generate a bash script to re-clone all repositories
  • make lsr an alias of ls --remote for backward compatibility
• Makefile: Add go-check-spellchecker and make fmt
• update to go1.26