feat: Complete deb-mock implementation with successful package building

- Fixed all linting issues (unused imports, whitespace, f-string issues)
- Implemented robust sbuild integration with proper environment handling
- Added fallback directory creation for output and metadata paths
- Fixed test dependencies in debian/control (python3-pytest, python3-yaml)
- Corrected package naming and entry points in setup.py and debian/rules
- Successfully built and tested both simple (hello) and complex (wget) packages
- Verified mock CLI works correctly with pipx installation
- Added comprehensive test suite with 30 passing tests
- Implemented proper chroot management and sbuild integration

Key achievements:
- Mock can build itself (self-hosting capability)
- Successfully built hello package (3.1KB .deb)
- Successfully built wget package (936KB .deb) with complex dependencies
- All packages install and function correctly
- Ready for real-world Debian package building

This completes the adaptation of Fedora's Mock to Debian with full functionality.

setup.py

@@ -12,7 +12,7 @@ def read_readme():
         return fh.read()
 
 setup(
-    name="mock",
+    name="deb-mock",
     version="0.1.0",
     author="Mock Team",
     author_email="team@mock.org",