DOC - Add design system documentation #457

Job	Run time
build PST docs (ubuntu-latest, 3.12)	17s
a11y-tests (ubuntu-latest, 3.12)	16s
build PST docs (macos-latest, 3.12)	18s
run-pytest (ubuntu-latest, 3.9)	15s
build PST docs (windows-latest, 3.12)	14s
run-pytest (ubuntu-latest, 3.10)	15s
build PST docs (ubuntu-latest, 3.9, 6.1)	15s
run-pytest (ubuntu-latest, 3.11)	14s
run-pytest (ubuntu-latest, 3.12)	14s
run-pytest (ubuntu-24.04, 3.11)	17s
run-pytest (ubuntu-24.04, 3.12)	18s
run-pytest (macos-14, 3.10)	20s
run-pytest (macos-14, 3.11)	16s
run-pytest (macos-14, 3.12)	18s
run-pytest (windows-latest, 3.9)	15s
run-pytest (windows-latest, 3.10)	13s
run-pytest (windows-latest, 3.11)	15s
run-pytest (windows-latest, 3.12)	15s
run-pytest (ubuntu-latest, 3.9, 6.1)	14s
run-pytest (ubuntu-latest, 3.12, dev)	16s
lighthouse-audit	1s
Check coverage	1s
profiling	1s
	5m 18s

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