feat(ui): add h1–h6 base typography styles #4956

Job	Run time
cache-dependencies	30s
reuse-compliance / reuse	15s
license-headers / Build LicenseEye	37s
license-headers / Apply LicenceHeader	-1s
tests	3m 35s
format-check	37s
license-check	30s
lint-check	1m 30s
dependency-pinning-check	24s
type-check	1m 24s
	9m 21s

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