docs: Add guide "HttpCrawler with custom parser" #36

Job	Run time
PR title check	4s
Code checks / Spell check	7s
Code checks / Actions lint check	28s
Doc checks / Doc checks / Docs check	1m 47s
Code checks / Lint check / Lint check (3.14)	29s
Code checks / Type check / Type check (3.11)	46s
Code checks / Lint check / Lint check (3.11)	26s
Code checks / Type check / Type check (3.13)	48s
Code checks / Lint check / Lint check (3.10)	27s
Code checks / Type check / Type check (3.14)	43s
Code checks / Type check / Type check (3.12)	43s
Code checks / Lint check / Lint check (3.12)	23s
Code checks / Lint check / Lint check (3.13)	24s
Code checks / Type check / Type check (3.10)	46s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.10)	4m 54s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	5m 12s
Tests / Unit tests / Unit tests (macos-latest, 3.11)	7m 41s
Tests / Unit tests / Unit tests (windows-latest, 3.10)	7m 42s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	4m 27s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	4m 30s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	6m 9s
Tests / Unit tests / Unit tests (macos-latest, 3.14)	4m 41s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	3m 33s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	6m 5s
Tests / Unit tests / Unit tests (macos-latest, 3.13)	5m 4s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	6m 24s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	7m 2s
Tests / Unit tests / Unit tests (macos-latest, 3.10)	7m 49s
Tests / Unit tests / Unit tests (macos-latest, 3.12)	3m 48s
	1h 33m 22s

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