Badger2040w

[Gadgetoid]

This PR includes a new firmware build for Badger2040w. It has several crucial changes which differ from or outright break compatibility with the regular Badger 2040-

• the launcher and examples are now included as an (optional) appended filesystem where the user can see and modify them directly.
• Badger 2040W uses PicoGraphics rather than Badger's own custom graphics library. PicoGraphics (currently) does not support pen "thickness." (edit: except for Hershey fonts where it has been specifically enabled)
• examples have been updated to use PicoGraphics via a "badger2040w" library that attempts to shim compatibility for stuff that's missing from PicoGraphics (drawing icons and images from data, for example) and catch calls to functions which don't exist in PicoGraphics (thickness, invert, etc)

Questions

• Is the "badger2040w" shim a good idea if it hides PicoGraphics?
• What example(s) could be added to showcase WiFi functionality?

TODO

• get launcher icons loading from JPEG files
• get the launcher working & tested
• need icons for "Network Info" and "News"
• get LED working
• drop battery meter from launcher, add WiFi connection status indicator maybe?
• get "halt" working
• test wakeup GPIO state etc works
• can we do anything about "thickness"?
• port and test remaining examples- are any (other than ntptime in the clock) suitable for WiFi connectivity?