Initial commit: apt-wrapper - Simple APT transaction wrapper

- Core transaction API with add_package, resolve, commit, rollback
- Version tracking for upgrades/downgrades
- Simple package info with FFI conversion functions
- Comprehensive error handling
- Basic test suite
- Clean, minimal implementation (~326 lines total)

examples/simple_usage.rs

@@ -0,0 +1,45 @@
+//! Simple usage example for APT wrapper
+
+use apt_wrapper::{AptTransaction, init, search_packages};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    println!("=== Simple APT Wrapper Example ===");
+    
+    // Initialize
+    init()?;
+    println!("✓ APT wrapper initialized");
+    
+    // Search for packages
+    let packages = search_packages("vim")?;
+    println!("Found {} packages matching 'vim'", packages.len());
+    
+    // Create transaction
+    let mut tx = AptTransaction::new()?;
+    println!("✓ Created transaction");
+    
+    // Add packages
+    tx.add_package("apt")?;
+    tx.add_package("curl")?;
+    println!("✓ Added packages to transaction");
+    
+    // Resolve dependencies
+    tx.resolve()?;
+    println!("✓ Dependencies resolved");
+    
+    // Show what would be installed
+    println!("Packages in transaction: {:?}", tx.packages());
+    
+    // Note: We don't actually commit in the example to avoid installing packages
+    // tx.commit()?;
+    // println!("✓ Transaction committed");
+    
+    // If commit failed, you could rollback:
+    // tx.rollback()?;
+    // println!("✓ Transaction rolled back");
+    // println!("Changed packages: {:?}", tx.changed_packages());
+    
+    println!("✓ Transaction ready (not committed in example)");
+    
+    println!("=== Example completed ===");
+    Ok(())
+}