feat: switch to crane

package.nix

@@ -1,23 +1,21 @@
 {
-  lib,
-  rustPlatform,
-  mold-wrapped,
   self,
+  lib,
+  craneLib,
+  mold-wrapped,
 }:
 let
   cargoToml = lib.importTOML ./Cargo.toml;
   rev = self.shortRev or self.dirtyShortRev or "dirty";
 in
-rustPlatform.buildRustPackage {
+craneLib.buildPackage {
   pname = cargoToml.package.name;
   version = "${cargoToml.package.version}+git.${rev}";
 
-  src = self;
+  src = craneLib.cleanCargoSource ./.;
 
   nativeBuildInputs = [ mold-wrapped ];
 
-  cargoLock.lockFile = ./Cargo.lock;
-
   RUSTFLAGS = "-C link-arg=-fuse-ld=mold";
 
   doCheck = false;