feat: move configuration files inside home folder

home/.config/zsh/ohmyzsh/plugins/sigstore/README.md

@@ -0,0 +1,13 @@
+# Sigstore plugin
+
+This plugin sets up completion for the following [Sigstore](https://sigstore.dev/) CLI tools.
+
+- [Cosign](https://docs.sigstore.dev/cosign/overview)
+- [Sget](https://docs.sigstore.dev/cosign/installation#alpine-linux)
+- [Rekor](https://docs.sigstore.dev/rekor/overview)
+
+To use it, add `sigstore` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... sigstore)
+```