site(math): 0.3.0 release essay + playground deep links #322

Job	Run time
Lint, test, build (ubuntu-latest, Node 22)	1m 17s
Lint, test, build (windows-latest, Node 22)	1m 43s
Lint, test, build (ubuntu-latest, Node 20)	1m 19s
Lint, test, build (macos-latest, Node 20)	2m 52s
Lint, test, build (macos-latest, Node 22)	3m 23s
Lint, test, build (windows-latest, Node 20)	40s
	11m 14s

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