chore(website): migrate to pnpm and enable minimum release age #466

Job	Run time
PR title check	5s
Docstrings checks / Docstrings checks	12s
Tests / Integration tests (3.14, ubuntu-latest)	2m 19s
Tests / Integration tests (3.11, ubuntu-latest)	2m 20s
Code checks / Spell check	4s
Code checks / Actions lint check	33s
Doc checks / Doc checks / Docs check	1m 5s
Code checks / Lint check / Lint check (3.14)	9s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	38s
Code checks / Type check / Type check (3.13)	11s
Code checks / Type check / Type check (3.12)	12s
Code checks / Type check / Type check (3.14)	14s
Code checks / Lint check / Lint check (3.11)	15s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	41s
Code checks / Lint check / Lint check (3.12)	14s
Code checks / Type check / Type check (3.11)	11s
Code checks / Lint check / Lint check (3.13)	11s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	45s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 12s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 2s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 4s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 24s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	38s
	15m 39s

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