feat: add attestation github action

Author: willemneal

.github/workflows/cd-registry-attestation.yml

@@ -0,0 +1,22 @@
+name: Build and Release # name it whatever you like
+on:
+  push:
+    tags:
+      - "registry-v*" # triggered whenever a new tag (prefixed with "v") is pushed to the repository
+
+permissions: # required permissions for the workflow
+  id-token: write
+  contents: write
+  attestations: write
+
+jobs:
+  release-contract-a:
+    uses: stellar-expert/soroban-build-workflow/.github/workflows/release.yml@main
+    with:
+      release_name: ${{ github.ref_name }} # use git tag as unique release name
+      release_description: "Contract release" # some boring placeholder text to attach
+      home_domain: "theaha.co" # home domain for the contract
+      relative_path: '["contracts/registry"]' # relative path to your really awesome contract
+      package: "registry" # package name to build
+    secrets: # the authentication token will be automatically created by GitHub
+      release_token: ${{ secrets.GITHUB_TOKEN }} # don't modify this line

contracts/registry/Cargo.toml

@@ -7,6 +7,8 @@ license = "Apache-2.0"
 rust-version = "1.69"
 edition = "2021"
 publish = false
+repository = "https://github.com/theahaco/scaffold-stellar/tree/main/contracts/registry"
+
 
 [lib]
 crate-type = ["cdylib"]