chore: fix and update .gitignore for webdriver directories

- Fix malformed entry in .gitignore
- Add .wdm/ and tests/.wdm/ directories
- Add geckodriver/ directory
- These are generated during tests and should not be committed

Author: FernandoCelmer

.gitignore

@@ -160,4 +160,8 @@ cython_debug/
 #.idea/
 
 # Others
-geckodrivertests/.wdm/
+
+# Webdriver manager cache directories
+.wdm/
+tests/.wdm/
+geckodriver/