Move to adafruit_hid 5.x, alt-codes helper

Remove the keyboard_layout module, it is now in adafruit_hid since 5.x.
Makes it easier to install and take less space overall, especially on boards where adafruit_hid is frozen.
Requires adafruit_hid 5.x minimum, and Circuitpython 7.1.1 on boards where adafruit_hid is frozen.

Add the alt_codes helper module to type additional characters on windows and linux via number codes, courtesy of nico7885.

Languages included:

• Windows
  • Portuguese (Brazil)
  • Czech CZ and CZ1
  • Danish
  • Dvorak
  • French
  • German (DE)
  • Hungarian
  • Italian
  • Polish
  • Spanish (ES)
  • Swedish
  • Turkish (TR)
• MacOS
  • French