Improve I2C LCD example

[Windwoes]

This PR improve the I2C LCD example in the following ways:

• Extracts driver code to a separate C file for code cleanliness
• Supports creating multiple instances of the driver so that multiple displays can be driven
• Improves performance by using better chosen delay values
• Has functionality to simplify printed formatted strings to the display

The following article was used as a reference for timing: https://web.alfredstate.edu/faculty/weimandn/lcd/lcd_initialization/lcd_initialization_index.html

This code has been tested on real hardware with a Pi Pico.

Fixes #654 Fixes #597