Grscheller.boring-math

* removed MathJax expressions
* not worth the increased maintenance
* can get almost the same results using `expresions` and unicode

* MathJax expressions used to render non-code mathematical expressions
* pdoc accepts MathJax expressions with --math option
* `$ pdoc --math -o . grscheller.boring_math`

* updated to use grscheller.circular-array 3.4.1
* this version of CA compares first with identity before trying equality
* like Python builtins do
* now using pdoc instead of pdoc3 for documentation
* replaced github markdown with std markdown

* updated to use grscheller.circular-array 3.3.1
* minimum Python version now 3.12
* target Python version now 3.13

* reflecting grscheller.circular-array PyPI dependency change
* dependencies = ["grscheller.circular-array >= 0.2.0, < 2.1"]

* decided it a good time for a PyPI release
* want to use some of the newer features in new endeavors
* vastly improved documentation over last PyPI release