start writing ps7init extractor

tools/zynq7000-ps7init-extract/src/main.rs

@@ -1,4 +1,4 @@
-use std::path::Path;
+use std::{fs::File, path::Path};
 
 use clap::Parser as _;
 
@@ -17,4 +17,6 @@ fn main() {
         eprintln!("File not found: {}", ps7init_tcl.display());
         std::process::exit(1);
     }
+    let file_path = "ddr_config.rs";
+    let file = File::create(file_path).expect("Failed to create file");
 }