tools: add UniFFI codegen script (no-op if uniffi-bindgen missing)

scripts/uniffi_codegen.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+UDL=core/uniffi/cryptec.udl
+OUT_ANDROID=core/uniffi/bindings/android
+OUT_IOS=core/uniffi/bindings/ios
+
+echo "[uniffi-codegen] UDL: $UDL"
+
+if command -v uniffi-bindgen >/dev/null 2>&1; then
+  echo "[uniffi-codegen] running uniffi-bindgen (java, objc)"
+  uniffi-bindgen generate "$UDL" -l java -o "$OUT_ANDROID"
+  uniffi-bindgen generate "$UDL" -l objc -o "$OUT_IOS"
+  echo "[uniffi-codegen] generated bindings in $OUT_ANDROID and $OUT_IOS"
+else
+  echo "[uniffi-codegen] uniffi-bindgen not found; skipping codegen (placeholders must exist)"
+fi