* correct filename in name_badge.py for Tufty
* Update 240x240 round breakout examples to work with PicoGraphics
* Update colourlcd240x240demo.py to work with PicoGraphics
* Fixed rainbow.py for Pico Display and Pico Display 2.0
* Update display examples to work with PicoGraphics
* add new display example 🌈
* adventures in rainbow RAM
* add button example for pico inky pack
* tidy up examples, make names more consistent
* Update Pico Explorer and 160x80 LCD breakout examples
* Accommodate dither
* Make ST7789 accept only full config with SPI pins
* Make Generic ST7789 wrapper library handle "slot"
* Update Round LCD and 240x240 Square LCD
* Remove Python Round LCD and 240x240 LCD modules (we need the space!)
* Remove C++ Round LCD and 240x240 LCD libraries (they're a little redundant!)
* Fix garbage collected framebuffer bug in Python ST7789
* Deprecate "flip" in favour of "configure_display"
* Tidy up ST7789, remove dead/unused/commented code
Hel Gibbons