Add tests for `CrawleeLogFormatter` #32

Job	Run time
Run linting / Linting (3.9)	38s
Run type checking / Type checking (3.9)	33s
Run linting / Linting (3.10)	29s
Run unit tests / Unit tests (ubuntu-latest, 3.9)	31s
Run type checking / Type checking (3.10)	38s
Run linting / Linting (3.11)	25s
Check changelog entry / Check changelog entry	31s
Run unit tests / Unit tests (ubuntu-latest, 3.10)	37s
Run linting / Linting (3.12)	27s
Run type checking / Type checking (3.11)	31s
Run unit tests / Unit tests (ubuntu-latest, 3.11)	31s
Run type checking / Type checking (3.12)	31s
Run unit tests / Unit tests (ubuntu-latest, 3.12)	35s
Check version conflict / Check version conflict	34s
Run unit tests / Unit tests (windows-latest, 3.9)	1m 22s
Run unit tests / Unit tests (windows-latest, 3.10)	1m 41s
Run unit tests / Unit tests (windows-latest, 3.11)	1m 30s
Run unit tests / Unit tests (windows-latest, 3.12)	1m 31s
	13m 35s

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