refactor: replace StrInput with MultilineInput for URL fields (FirecrawlAPI) (#6160)

* 📝 (firecrawl_crawl_api.py): update StrInput to MultilineInput for better handling of URL input
📝 (firecrawl_scrape_api.py): update StrInput to MultilineInput for better handling of URL input

* [autofix.ci] apply automated fixes

* ✨ (firecrawl_crawl_api.py): introduce StrInput class to langflow.io module for handling string inputs in the API

* [autofix.ci] apply automated fixes

* ✨ (changes-filter.yaml): add new directories to components list for langflow schema and utils to be included in changes filtering

* ✨ (changes-filter.yaml): add new directory "src/backend/base/langflow/graph/" to components list for changes filtering in the workspace.

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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>