refactor: Make all fetchers as an optional dependency group

feat(DynamicSession): Improve normal fetches speed

feat(fetchers): Improve StealthyFetcher + Adding StealthySession/AsyncStealthySession classes

feat/refactor(fetchers): Replacing PlayWrightFetcher with DynamicFetcher and adding session classes

feat(Fetcher): Replacing httpx + Adding FetcherSession

chore: migrating to ruff and updating pre-commit hooks

Sorting all library imports with `isort`

Big structure changes (check commit description)

Adding browsing engines