chore(merge): sync dev branch to master

[T0nyX1ang]

• frontend:
  • support url loading in example
  • add bug tracker link
  • add a rule button
  • make a search box in the puzzle selection
• backend:
  • fix hitori api inconsistency
  • fix shakashaka solver
  • optimize grid_color_connected
  • add question mark clues in more puzzles
  • simplify codes in full_bfs
• chore:
  • add vercel support
  • update pre-commit hooks
  • remove packaging specifications
  • update pdm lock file