feat: implement CLI for XBRL parsing and validation

- Parse command with optional stats flag
- Validate command with SEC EDGAR profile support
- Benchmark command for performance testing
- Colored output for better UX

examples/validate.rs

@@ -0,0 +1,35 @@
+//! Validation example
+
+use crabrl::{Parser, Validator};
+use std::env;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let args: Vec<String> = env::args().collect();
+    if args.len() != 2 {
+        eprintln!("Usage: {} <xbrl-file>", args[0]);
+        std::process::exit(1);
+    }
+
+    // Parse
+    let parser = Parser::new();
+    let doc = parser.parse_file(&args[1])?;
+    
+    // Validate
+    let validator = Validator::new();
+    let result = validator.validate(&doc)?;
+    
+    if result.is_valid {
+        println!("✓ Document is valid");
+    } else {
+        println!("✗ Document has {} errors", result.errors.len());
+        for error in result.errors.iter().take(5) {
+            println!("  - {}", error);
+        }
+    }
+    
+    println!("\nValidation stats:");
+    println!("  Facts validated: {}", result.stats.facts_validated);
+    println!("  Time: {}ms", result.stats.duration_ms);
+    
+    Ok(())
+}