Add formatter (watcher)

[Yusuke Konishi]

• Pan formatter
  • Divide by specific character - {space}
  • End input listener (different by brand)
• Expiry month/year formatter
  • Divide by / character
  • Fill 0
  • End input listener
• Expiry month formatter
  • Fill 0
  • End input listener
• Expiry year formatter
  • End input listener
• Cvv2
  • End input listener (different by brand)