docs: add initial placeholder files for project

Add empty GitHub workflow file and basic README template to establish repository structure. The README includes section placeholders that will be filled as the project progresses.

README.md

@@ -0,0 +1,20 @@
+# Samsung KernelSU SUSFS
+
+This is a placeholder README for the `Samsung_KernelSU_SUSFS` project.
+Details will be added as the repository structure and features are defined.
+
+## Overview
+- Placeholder for project description and goals.
+
+## Getting Started
+- Placeholder for setup, dependencies, and usage instructions.
+
+## Build
+- Placeholder for build steps and tooling.
+
+## Contributing
+- Placeholder for contribution guidelines.
+
+## License
+- Placeholder for license information.
+