Use a submodule for gomuks source

scripts/generate.dart

@@ -3,39 +3,7 @@ import "package:ffigen/ffigen.dart";
 import "package:path/path.dart";
 
 void main(List<String> args) async {
-  final repoDir = Directory.fromUri(
-    Platform.script.resolve("../src/gomuks/source"),
-  );
-  if (await repoDir.exists()) await repoDir.delete(recursive: true);
-  await repoDir.create(recursive: true);
-
-  print("Cloning Gomuks repository...");
-  final cloneResult = await Process.run("git", [
-    "clone",
-    "https://github.com/zachatrocity/gomuks",
-    repoDir.path,
-  ]);
-
-  if (cloneResult.exitCode != 0) {
-    throw Exception(
-      "Failed to clone Gomuks repository: \n${cloneResult.stderr}",
-    );
-  }
-
-  final commit = await File.fromUri(
-    Platform.script.resolve("../gomuks.lock"),
-  ).readAsString();
-
-  final checkoutResult = await Process.run("git", [
-    "checkout",
-    commit,
-  ], workingDirectory: repoDir.path);
-
-  if (checkoutResult.exitCode != 0) {
-    throw Exception(
-      "Failed to check out locked commit: \n${checkoutResult.stderr}",
-    );
-  }
+  final repoDir = Directory.fromUri(Platform.script.resolve("../gomuks"));
 
   print("Generating FFI Bindings...");