test: add test file for PR verification

Co-authored-by: Ona <no-reply@ona.com>

.devcontainer/Dockerfile

@@ -1,5 +0,0 @@
-FROM mcr.microsoft.com/devcontainers/base:ubuntu-24.04
-
-# use this Dockerfile to install additional tools you might need, e.g.
-# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-#     && apt-get -y install --no-install-recommends <your-package-list-here>

.devcontainer/devcontainer.json

@@ -1,20 +0,0 @@
-// The Dev Container format allows you to configure your environment. At the heart of it
-// is a Docker image or Dockerfile which controls the tools available in your environment.
-//
-// See https://aka.ms/devcontainer.json for more information.
-{
-	"name": "Ona",
-	// Use "image": "mcr.microsoft.com/devcontainers/base:ubuntu-24.04",
-	// instead of the build to use a pre-built image.
-	"build": {
-        "context": ".",
-        "dockerfile": "Dockerfile"
-    }
-	// Features add additional features to your environment. See https://containers.dev/features
-	// Beware: features are not supported on all platforms and may have unintended side-effects.
-	// "features": {
-    //   "ghcr.io/devcontainers/features/docker-in-docker": {
-    //     "moby": false
-    //   }
-    // }
-}

test.md

@@ -0,0 +1,3 @@
+# Test PR
+
+This is a test file created to verify PR creation.