Suggestion: Pico OLED 1.3 rotation example

[maverickagm]

The demo code doesn't handle 90 degree rotation. It's not trivial to rotate the display, but it's definitely possible. The display on the Pico OLED 1.3" is an SH1107. Perhaps the Pico OLED 1.3" display driver should be rebased off of https://github.com/peter-l5/SH1107

I used Thonny to copy over sh1107.py. Then I used the following to initialize the display (SPI mode) and rotate it 90 degrees clockwise:

import sys, time
from machine import Pin,SPI
import sh1107

# Pin numbers for Waveshare Pico OLED 1.3"
DC = 8
RST = 12
MOSI = 11
SCK = 10
CS = 9

# init screen
ROTATE = 90 # for 90 degree clockwise rotation
spi1 = SPI(1,20000_000, polarity=0, phase=0, sck=Pin(SCK), mosi=Pin(MOSI), miso=None)
display = sh1107.SH1107_SPI(128, 64, spi1, Pin(DC), Pin(RST), Pin(CS), rotate=ROTATE)

display.fill(0)
display.text("Hello",0, 2,1)
display.text("World",0,10,1)
display.show()
time.sleep(1)
sys.exit(0)

Minor note: The example code downloaded from https://files.waveshare.com/upload/5/5a/Pico_code.7z is newer than what's in this repo.