chore(website): migrate to pnpm and enable minimum release age #478

Job	Run time
PR title check	5s
Tests / Integration tests (3.14, ubuntu-latest)	2m 31s
Code checks / Actions lint check	31s
Code checks / Spell check	6s
Docstrings checks / Docstrings checks	16s
Tests / Integration tests (3.11, ubuntu-latest)	2m 22s
Doc checks / Doc checks / Docs check	1m 11s
Code checks / Lint check / Lint check (3.14)	12s
Code checks / Lint check / Lint check (3.12)	12s
Code checks / Lint check / Lint check (3.11)	8s
Code checks / Type check / Type check (3.14)	14s
Code checks / Type check / Type check (3.13)	12s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 4s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	41s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	43s
Code checks / Type check / Type check (3.12)	12s
Code checks / Lint check / Lint check (3.13)	22s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 4s
Code checks / Type check / Type check (3.11)	9s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 39s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	50s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 9s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	35s
	16m 28s

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