Wire local TDLib into iOS FFI build

crates/vendor/tdlib-rs/examples/test_ci.rs

@@ -0,0 +1,12 @@
+// cargo run -p tdlib-rs --example test_ci --features default
+// cargo run -p tdlib-rs --example test_ci --features download-tdlib
+// cargo run -p tdlib-rs --example test_ci --features pkg-config
+
+#[tokio::main]
+async fn main() {
+    // Create the client object for testing
+    let _client_id = tdlib_rs::create_client();
+
+    // Exit 0
+    std::process::exit(0);
+}