Fix dependency conflicts in requirements.txt

Updated package versions to resolve numpy compatibility issue:
- Changed numpy from ==1.24.1 to >=1.24.1,<2.3.0 (compatible with opencv-python 4.12.0.88)
- Changed Pillow from ==10.1.0 to >=10.1.0,<12.0 (compatible with gradio 5.37.0)
- Added missing dependencies: pydantic, huggingface-hub, fsspec
- Added .gitignore to exclude __pycache__ and temporary files

This resolves the pip installation error where opencv-python==4.12.0.88
requires numpy>=2.0 but the old requirements.txt specified numpy==1.24.1.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,25 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+
+# Virtual environments
+venv/
+ENV/
+env/
+
+# IDE
+.vscode/
+.idea/
+
+# Temporary files
+*.sh
+=*
+GITHUB_ISSUE_RESPONSE.md
+
+# Distribution / packaging
+build/
+dist/
+*.egg-info/