chore(website): migrate to pnpm and enable minimum release age #469

Job	Run time
PR title check	5s
Code checks / Actions lint check	53s
Docstrings checks / Docstrings checks	13s
Code checks / Spell check	6s
Tests / Integration tests (3.14, ubuntu-latest)	2m 21s
Tests / Integration tests (3.11, ubuntu-latest)	2m 20s
Code checks / Lint check / Lint check (3.12)	15s
Code checks / Lint check / Lint check (3.13)	14s
Code checks / Lint check / Lint check (3.11)	8s
Code checks / Type check / Type check (3.12)	13s
Code checks / Type check / Type check (3.11)	8s
Code checks / Lint check / Lint check (3.14)	12s
Code checks / Type check / Type check (3.13)	16s
Code checks / Type check / Type check (3.14)	11s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	37s
Doc checks / Doc checks / Docs check	1m 5s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 1s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	40s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	41s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 6s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	55s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	59s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	39s
	15m 18s

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