chore(website): migrate to pnpm and enable minimum release age #525

Job	Run time
PR title check	4s
Docstrings checks / Docstrings checks	14s
Tests / Integration tests (3.11, ubuntu-latest)	2m 28s
Tests / Integration tests (3.14, ubuntu-latest)	2m 26s
Code checks / Spell check	7s
Code checks / Actions lint check	1m 14s
Doc checks / Doc checks / Docs check	1m 13s
Code checks / Type check / Type check (3.14)	17s
Code checks / Type check / Type check (3.11)	10s
Code checks / Type check / Type check (3.13)	11s
Code checks / Lint check / Lint check (3.12)	15s
Code checks / Lint check / Lint check (3.14)	11s
Code checks / Type check / Type check (3.12)	13s
Code checks / Lint check / Lint check (3.13)	16s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	41s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 23s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 0s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	44s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	41s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	58s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	48s
Code checks / Lint check / Lint check (3.11)	18s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	51s
	16m 43s

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