chore(website): migrate to pnpm and enable minimum release age #465

Job	Run time
PR title check	5s
Tests / Integration tests (3.14, ubuntu-latest)	2m 19s
Tests / Integration tests (3.11, ubuntu-latest)	2m 14s
Code checks / Actions lint check	31s
Code checks / Spell check	4s
Docstrings checks / Docstrings checks	11s
Doc checks / Doc checks / Docs check	1m 12s
Code checks / Type check / Type check (3.14)	14s
Code checks / Type check / Type check (3.11)	12s
Code checks / Type check / Type check (3.13)	11s
Code checks / Lint check / Lint check (3.13)	20s
Code checks / Lint check / Lint check (3.11)	11s
Code checks / Lint check / Lint check (3.14)	14s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	41s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	56s
Code checks / Type check / Type check (3.12)	12s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	40s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	38s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 33s
Code checks / Lint check / Lint check (3.12)	11s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 10s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 0s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	46s
	15m 45s

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