* Absorb ST7735 support into the generic ST7789 driver and rename to PicoGraphics
* Delete obsolete MicroPython modules
* Refactor PicoGraphics to inherited class for each pen type
* Refactor ST7789 and ST7735 to derive from DisplayDriver
* Allow user to set pen_type in MicroPython constructor for RGB565, RGB332, P8 and P4 modes
This allows fonts to be hot-swapped out by calling `set_font`
Unfortunately the way fonts are currently stored limits the maximum height to 8 pixels, since that's the size of a uint8_t and the y dimension is bitwise encoded.
The width can be arbitrary, by specifying the widths and max_width (the multiplier for number of bytes per char).
Might be worth grabbing some more bits from 32blit to make this not terrible, but now a user-defined font is an .hpp and a `set_font` away.
The upstream MicroPython rp2 port has re-enabled -Werror so we need to either fix warnings or,
in the case of those generated by C++/C MicroPython binding weirdness, suppress them.
* typedef pen and constexpr create_pen for #6
* Prevent out of bounds clip permitting write outside buffer
* camelcase rect, point, and pen types
* added triangle(p1, p2, p3) and polygon(std::vector<Point> points) methods to graphics library
* change all uses of pen that were uint16_t into Pen type
* updated micropython modules to use new rect, point, pen naming
* added line(p1, p2) method to pico graphics library with faster vertical/horizontal special cases
Co-authored-by: Jonathan Williamson <jon@pimoroni.com>
Phil Howard