ci: add markdown, website, and image lint checks #847

Job	Run time
Checks / E2E tests (3.11, ubuntu-latest)	4m 46s
Checks / Lint check / Lint check (3.14)	15s
Checks / Type check / Type check (3.11)	13s
Checks / Type check / Type check (3.14)	16s
Checks / Type check / Type check (3.13)	11s
Checks / Type check / Type check (3.12)	11s
Checks / E2E tests (3.14, ubuntu-latest)	5m 33s
Checks / Lint check / Lint check (3.12)	14s
Checks / Lint check / Lint check (3.11)	10s
Checks / Doc check / Docs check	55s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.11)	1m 8s
Checks / Unit tests / Unit tests (windows-latest, 3.11)	1m 46s
Checks / Unit tests / Unit tests (windows-latest, 3.12)	1m 31s
Checks / Unit tests / Unit tests (windows-latest, 3.13)	2m 4s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.12)	1m 15s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.14)	1m 15s
PR title check	11s
Checks / Spell check	6s
Checks / Unit tests / Unit tests (windows-latest, 3.14)	1m 46s
Checks / Integration tests (3.11, ubuntu-latest)	2m 22s
Checks / Actions lint check	32s
Checks / Website lint check	33s
Checks / Lint check / Lint check (3.13)	16s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.13)	1m 16s
Checks / Package check	18s
Checks / Integration tests (3.14, ubuntu-latest)	2m 45s
Checks / Image lint check	9s
Checks / Markdown lint check	33s
	32m 30s

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