feat: Implement comprehensive Debian packaging improvements and enhanced CI workflow

- Enhanced Package Information: Expanded PackageInfo struct with 23 fields including section, priority, maintainer, homepage, size, dependencies, and more
- Real Package Data Extraction: Integrated dpkg and apt-cache for actual package information instead of mock data
- Professional Debian Packaging: Added man pages, shell completions, postinst/prerm scripts, triggers, and lintian overrides
- Enhanced Build System: Improved debian/rules with cross-compilation support, enhanced build.sh with options and validation
- CI Workflow Updates: Added missing build dependencies, enhanced package validation, lintian quality checks, and comprehensive reporting
- Quality Assurance: Added lintian validation, enhanced file checking, and professional packaging standards
- Documentation: Comprehensive README.Debian with build instructions and troubleshooting guide

Resolves mock package issues and provides production-ready Debian packaging infrastructure.

debian/local-options

@@ -0,0 +1,27 @@
+# Local build options for apt-ostree
+# This file contains options for local development builds
+# It should not be committed to version control
+
+# Enable verbose output during build
+export DH_VERBOSE = 1
+
+# Enable parallel builds
+export MAKEFLAGS = -j$(nproc)
+
+# Enable debug symbols in release builds
+export CARGO_PROFILE_RELEASE_DEBUG = 1
+
+# Enable backtraces for better error reporting
+export RUST_BACKTRACE = 1
+
+# Set log level for debugging
+export APT_OSTREE_LOG_LEVEL = debug
+
+# Enable additional Rust features for development
+export CARGO_FEATURES = dev-tools
+
+# Disable optimization for faster builds during development
+export CARGO_PROFILE_RELEASE_OPT_LEVEL = 0
+
+# Enable incremental compilation
+export CARGO_INCREMENTAL = 1