feat: Implement tracing & `thiserror` error types #35

Job	Run time
run-cargo-tests (stable)	1m 15s
run-cargo-tests (nightly)	2m 51s
run-checks (stable)	3m 54s
run-checks (nightly)	2m 49s
run-checks (1.66)	5m 34s
run-headless-tests (ubuntu-latest, firefox)	47s
run-headless-tests (ubuntu-latest, chrome)	39s
	17m 49s

Provide feedback