- Rename str_to_bool() -> to_bool()
- Enhance to_bool() so that it accepts and converts bool, int, and float in addition to str

Also reduced amount of style characters appended to truncated text.
These changes were made to reduce memory usage in certain use cases of tables (e.g. nested colored tables).

* Update modular_commands.rst

The args given in the example are integers. Direct concatenation to string raises errors

* Changed to f-string as per review comment

Co-authored-by: Todd Leonhardt <todd.leonhardt@gmail.com>

Co-authored-by: Todd Leonhardt <todd.leonhardt@gmail.com>

* Added substantial documentation concerning pyscript

* Made suggested changes

* final changes

* fixed grammatical errors

Co-authored-by: jay <you@example.com>
Co-authored-by: Todd Leonhardt <todd.leonhardt@gmail.com>
Co-authored-by: J A <jand@blah.blah>

Added support for 24-bit/RGB colors with the cmd2.RgbFg and cmd2.RgbBg classes.

Removed dependency on colorama.

Deprecated cmd2.fg. Use cmd2.Fg instead.
Deprecated cmd2.bg. Use cmd2.Bg instead.

Changed type of ansi.allow_style from a string to an ansi.AllowStyle Enum class.
Fixed bug where using choices on a Settable didn't verify that a valid choice had been entered.