Rename crate to veil-rs and update Nix scripts

Change package name from veil_rs to veil-rs.
Update Cargo.toml and Cargo.lock accordingly.
Update cargoHash in default.nix for the renamed package.
Comment out postInstall step that renamed the binary.
Rename `args` variable to `_args` in main.rs to silence unused warning.

default.nix

@@ -21,7 +21,7 @@ in
     #   hash = lib.fakeHash;
     # };
 
-    cargoHash = "sha256-QV++fXA2+0Irzwtb6jCrphjIKKEtz8jOJURMnSP3YF4=";
+    cargoHash = "sha256-AVFUk9Deq9bPp+UK0fZlRA81S5NxiEHV7HypGGsJ4/0=";
 
     nativeBuildInputs = [pkg-config];
 
@@ -32,9 +32,9 @@ in
 
     passthru.updateScript = nix-update-script {};
 
-    postInstall = ''
-      mv $out/bin/veil_rs $out/bin/veil-rs
-    '';
+    # postInstall = ''
+    #   cp static files
+    # '';
 
     meta = {
       description = "Declarative Tauri wrapper";