Merge branch 'ex01' into 'main'

Add exercise set 1

See merge request lara/cs320!5

info/exercises/past-exercises/README.md

+# Past Exercises
+
+This is the collection of the exercises used in previous iterations of the
+course. They are here if you wish to try additional exercises, but note that not
+everything may necessarily match the current content of the course. 

info/exercises/src/.gitignore

+*.aux
+*.fdb_latexmk
+*.fls
+*.log
+*.out
+*.synctex.gz
+*.pdf