Fix sbuild integration and clean up codebase

- Fix environment variable handling in sbuild wrapper
- Remove unsupported --log-dir and --env options from sbuild command
- Clean up unused imports and fix linting issues
- Organize examples directory with official Debian hello package
- Fix YAML formatting (trailing spaces, newlines)
- Remove placeholder example files
- All tests passing (30/30)
- Successfully tested build with official Debian hello package

deb_mock/__init__.py

@@ -1,7 +1,7 @@
 """
 Deb-Mock: A low-level utility to create clean, isolated build environments for Debian packages
 
-This tool is a direct functional replacement for Fedora's Mock, adapted specifically 
+This tool is a direct functional replacement for Fedora's Mock, adapted specifically
 for Debian-based ecosystems.
 """
 
@@ -9,14 +9,14 @@ __version__ = "0.1.0"
 __author__ = "Deb-Mock Team"
 __email__ = "team@deb-mock.org"
 
-from .core import DebMock
-from .config import Config
 from .chroot import ChrootManager
+from .config import Config
+from .core import DebMock
 from .sbuild import SbuildWrapper
 
 __all__ = [
     "DebMock",
-    "Config", 
+    "Config",
     "ChrootManager",
     "SbuildWrapper",
-] 
+]