chore(website): migrate to pnpm and enable minimum release age #434

Job	Run time
PR title check	5s
Tests / Integration tests (3.14, ubuntu-latest)	2m 14s
Code checks / Actions lint check	31s
Tests / Integration tests (3.11, ubuntu-latest)	2m 29s
Code checks / Spell check	9s
Docstrings checks / Docstrings checks	11s
Doc checks / Doc checks / Docs check	1m 5s
Code checks / Type check / Type check (3.13)	14s
Code checks / Type check / Type check (3.14)	15s
Code checks / Type check / Type check (3.12)	14s
Code checks / Lint check / Lint check (3.11)	11s
Code checks / Lint check / Lint check (3.12)	14s
Code checks / Type check / Type check (3.11)	9s
Code checks / Lint check / Lint check (3.14)	13s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	37s
Code checks / Lint check / Lint check (3.13)	13s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	44s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 20s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 11s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 1s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	48s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 3s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	41s
	15m 52s

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