Add Commit Checker github action

Signed-off-by: Ricardo M. Oliveira <rmartine@redhat.com>

.github/workflows/commit-checker.yaml

@@ -0,0 +1,40 @@
+name: Commit Checker
+on:
+  pull_request:
+    types: [assigned, opened, synchronize, reopened]
+env:
+  GH_USER_EMAIL: 140449482+dsp-developers@users.noreply.github.com
+  GH_USER_NAME: dsp-developers
+jobs:
+    commit_checker:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                fetch-depth: 0
+            - name: Get Commits
+              id: get-commits
+              run: |
+                master_commit=$(cat .git/refs/remotes/origin/master)
+                echo "master_commit_hash=$master_commit" >> $GITHUB_OUTPUT
+                last_commit=$(cat .git/refs/remotes/pull/${{ github.event.pull_request.number }}/merge)
+                echo "last_commit_hash=$last_commit" >> $GITHUB_OUTPUT
+            - name: Run Commit Checker
+              shell: bash
+              env:
+                GH_TOKEN: ${{ secrets.GH_TOKEN_PROJECT_EDIT }}
+              continue-on-error: true
+              run: |
+                git config user.email "${{ env.GH_USER_EMAIL }}"
+                git config user.name "${{ env.GH_USER_NAME }}"
+
+                cat <<"EOF" >> /tmp/body-file.txt
+                ::group::Commit Checker results
+                ::warning ::==== These are the results of the commit checker scans         ====
+                ::warning ::==== If these are not commits from upstream kfp, then          ====
+                ::warning ::==== please ensure you adhere to the commit checker formatting ====
+                $(podman run -q -v ${{ github.workspace }}:/src/app-root quay.io/rmartine/commitchecker:latest --start ${{ steps.get-commits.outputs.master_commit_hash }} --end ${{ steps.get-commits.outputs.last_commit_hash }})
+                ::endgroup::
+                EOF
+
+                gh pr comment ${{ github.event.pull_request.number }} --body-file /tmp/body-file.txt

tools/commit_checker/Dockerfile

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+FROM registry.access.redhat.com/ubi8/go-toolset:1.20 as builder
+
+WORKDIR /tmp
+RUN git clone https://github.com/openshift/build-machinery-go.git && \
+    cd /tmp/build-machinery-go/commitchecker && \
+    go build
+
+FROM registry.access.redhat.com/ubi8/ubi-minimal:8.9
+
+WORKDIR /bin
+
+COPY --from=builder /tmp/build-machinery-go/commitchecker/commitchecker /bin/commitchecker
+RUN microdnf install git && \
+    chmod +x /bin/commitchecker && \
+    mkdir -p /src/app-root
+
+WORKDIR /src/app-root
+ENTRYPOINT ["commitchecker"]
+
+VOLUME ["/src/app-root"]
+
+LABEL name="Commit Checker tool" \
+      summary="commitchecker validates a range of commits in a git repository and ensures they meet specific requirements: \
+        1. The author's email address does not start with "root@". \
+        2. The message starts with one of: \
+            i. UPSTREAM: <PR number|carry|drop>: description \
+            ii. UPSTREAM: revert: \
+        This is useful for repositories that are downstream forks of upstream repositories."