ci: add conventional commit and branch checks from snowballr-ci

Author: Slartibartfass2

.github/workflows/git_conventions.yml

@@ -20,3 +20,30 @@ jobs:
               uses: SE-UUlm/snowballr-ci/src/ensure-linear-history@v1
               with:
                   target-branch: main
+
+    ensure-conventional-commits:
+        name: Ensure Conventional Commits
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v7
+              with:
+                  fetch-depth: 0
+                  ref: ${{ github.head_ref }}
+
+            - name: Run Check
+              uses: SE-UUlm/snowballr-ci/src/ensure-conventional-commits@feat/25-feature-add-more-git-conventions
+              with:
+                  target-branch: main
+
+    ensure-conventional-branches:
+        name: Ensure Conventional Branches
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v7
+
+            - name: Run Check
+              uses: SE-UUlm/snowballr-ci/src/ensure-conventional-branches@feat/25-feature-add-more-git-conventions
+              with:
+                  branch-name: ${{ github.head_ref }}