feat: add reproducible-containers/diffoci (#19964)

[reproducible-containers/diffoci](https://github.com/reproducible-containers/diffoci): diff for Docker and OCI container images

pkgs/reproducible-containers/diffoci/pkg.yaml

@@ -0,0 +1,4 @@
+packages:
+  - name: reproducible-containers/diffoci@v0.1.4
+  - name: reproducible-containers/diffoci
+    version: v0.1.2

pkgs/reproducible-containers/diffoci/registry.yaml

@@ -0,0 +1,29 @@
+packages:
+  - type: github_release
+    repo_owner: reproducible-containers
+    repo_name: diffoci
+    description: diff for Docker and OCI container images
+    version_constraint: "false"
+    version_overrides:
+      - version_constraint: semver("<= 0.1.2")
+        asset: diffoci-{{.Version}}.{{.OS}}-{{.Arch}}
+        format: raw
+        checksum:
+          type: github_release
+          asset: SHA256SUMS
+          algorithm: sha256
+        supported_envs:
+          - linux
+          - darwin
+      - version_constraint: Version == "v0.1.3"
+        no_asset: true
+      - version_constraint: "true"
+        asset: diffoci-{{.Version}}.{{.OS}}-{{.Arch}}
+        format: raw
+        checksum:
+          type: github_release
+          asset: SHA256SUMS
+          algorithm: sha256
+        supported_envs:
+          - linux
+          - darwin