chore: add sample files and README

README.md

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+# bling
+
+[![build-ublue](https://github.com/ublue-os/bling/actions/workflows/build.yml/badge.svg)](https://github.com/ublue-os/bling/actions/workflows/build.yml)
+
+A layer for extras and more bling for your image
+
+# Contains
+
+- A nix installer
+- Multiple fonts
+- Devpod
+- Justfiles
+- Yafti files
+- External repository files
+- Other `(TO BE DONE)`
+
+# Usage
+
+You can add this to your Containerfile to copy anything from this image over:
+
+    COPY --from=ghcr.io/ublue-os/bling:latest /usr/bin/ublue-nix-installer /
+    COPY --from=ghcr.io/ublue-os/bling:latest /usr/bin/ublue-nix-uninstaller /
+
+To use all fonts:
+
+    COPY --from=ublue-os/bling:latest /usr/share/fonts /path/to/fonts
+
+To use only Inter do:
+
+    COPY --from=ublue-os/bling:latest /usr/share/fonts/inter /path/to/fonts/inter
+
+We also want to package all these modifications as RPM packages for easier installation. `(TO BE DONE)`
+
+# Verification
+
+These images are signed with sisgstore's [cosign](https://docs.sigstore.dev/cosign/overview/). You can verify the signature by downloading the `cosign.pub` key from this repo and running the following command:
+
+    cosign verify --key cosign.pub ghcr.io/ublue-os/bling