chore: Rename test file to test_common.py and update docs link

- Rename the test file to `test_common.py` to better reflect its coverage of the `src.scraper.common` module.
- Update inline documentation reference from “see more in examples.py” to a proper Markdown link: “see more in [examples.py](examples.py)”.

Author: RandomProgramm3r

README.md

@@ -148,7 +148,7 @@ print(
 
 ### ⚡ Asynchronous usage
 
-#### see more in examples.py
+#### see more in [examples.py](examples.py)
 ```python
 async def main():
     items = [