init: Initial commit of assignment with complete rubric

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# On branch main
#
# Initial commit
#
# Changes to be committed:
#	new file:   .gitignore
#	new file:   pTree-a.pdf
#	new file:   pTree-a.tex
#	new file:   rubric-pTree-a.org
#	new file:   shapes.plantuml
#
