docs: Add guide "HttpCrawler with custom parser" #43

Job	Run time
PR title check	4s
Code checks / Actions lint check	34s
Code checks / Spell check	7s
Doc checks / Doc checks / Docs check	1m 42s
Code checks / Lint check / Lint check (3.12)	22s
Code checks / Lint check / Lint check (3.10)	22s
Code checks / Type check / Type check (3.13)	44s
Code checks / Type check / Type check (3.12)	47s
Code checks / Lint check / Lint check (3.13)	21s
Code checks / Lint check / Lint check (3.14)	27s
Code checks / Type check / Type check (3.14)	49s
Code checks / Lint check / Lint check (3.11)	21s
Code checks / Type check / Type check (3.10)	45s
Code checks / Type check / Type check (3.11)	42s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	4m 41s
Tests / Unit tests / Unit tests (macos-latest, 3.11)	4m 55s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	3m 33s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	4m 54s
Tests / Unit tests / Unit tests (macos-latest, 3.10)	6m 37s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	5m 10s
Tests / Unit tests / Unit tests (windows-latest, 3.10)	7m 1s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	5m 52s
Tests / Unit tests / Unit tests (macos-latest, 3.13)	3m 37s
Tests / Unit tests / Unit tests (macos-latest, 3.12)	5m 28s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	5m 55s
Tests / Unit tests / Unit tests (macos-latest, 3.14)	5m 37s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.10)	5m 14s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	5m 35s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	6m 50s
	1h 29m 6s

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