refactor: remove rust project

Removes rust directory containing the pubky library.
Updates build scripts to include local and remote options.
Updates README.md.
Adds simple-git as a dev dependency.

setup-local-android-bindings.js

@@ -0,0 +1,44 @@
+const fs = require('fs').promises;
+const path = require('path');
+
+const ktPath = 'rust/bindings/android/pubkymobile.kt';
+const ktDestinationPath = 'android/src/main/java/uniffi/pubkymobile/';
+const jniPath = 'rust/bindings/android/jniLibs';
+const jniDestinationPath = 'android/src/main/jniLibs/';
+
+async function runSetup() {
+  try {
+    console.log('Removing existing files...');
+    // Remove destination directories if they exist
+    await Promise.all([
+      fs.rm(ktDestinationPath, { recursive: true, force: true }),
+      fs.rm(jniDestinationPath, { recursive: true, force: true }),
+    ]);
+
+    console.log('Creating directories...');
+    // Create destination directories if they don't exist
+    await Promise.all([
+      fs.mkdir(ktDestinationPath, { recursive: true }),
+      fs.mkdir(jniDestinationPath, { recursive: true }),
+    ]);
+
+    console.log('Copying Kotlin file...');
+    // Copy Kotlin file to destination
+    const ktTargetPath = path.join(ktDestinationPath, 'pubkymobile.kt');
+    await fs.copyFile(ktPath, ktTargetPath);
+
+    console.log('Copying JNI libraries...');
+    // Copy JNI libraries directory
+    await fs.cp(jniPath, jniDestinationPath, { recursive: true });
+
+    console.log('Android files copied successfully!');
+  } catch (error) {
+    console.error('Error during setup:', error);
+    process.exit(1);
+  }
+}
+
+runSetup().catch((error) => {
+  console.error('Unhandled error:', error);
+  process.exit(1);
+});