feat(skip ci): add automatic-pr-labeler workflow to auto-label PRs based on changed files (#20)

Author: NetcrackerCLPLCI

.github/workflows/automatic-pr-labeler.yaml

@@ -0,0 +1,56 @@
+---
+
+# The workflow template for automatic PR labeler.
+# It requires to have a configuration file with labels and conditions to apply them.
+# The configuration file should be placed in the .github folder and named auto-labeler-config.yaml.
+# Example file can be found there:
+# https://github.com/Netcracker/.github/blob/main/config/examples/auto-labeler-config.yaml
+
+name: Automatic PR Labeler
+
+on:
+  pull_request:
+    branches: [main]
+    types:
+      [opened, reopened, synchronize]
+
+permissions:
+  contents: read
+
+jobs:
+  assign-labels:
+    if: (github.event.pull_request.merged == false) && (github.event.pull_request.user.login != 'dependabot[bot]') && (github.event.pull_request.user.login != 'github-actions[bot]')
+    permissions:
+      pull-requests: write
+      contents: read
+      issues: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+
+      - name: "Execute assign labels"
+        id: action-assign-labels
+        uses: mauroalderete/action-assign-labels@671a4ca2da0f900464c58b8b5540a1e07133e915 # v1.5.1
+        with:
+          pull-request-number: ${{ github.event.pull_request.number }}
+          github-token: ${{ github.token }}
+          conventional-commits: "./.github/auto-labeler-config.yaml"
+          maintain-labels-not-matched: true
+          apply-changes: ${{ github.event.pull_request.base.repo.id == github.event.pull_request.head.repo.id }}
+
+      - name: Set labels-next safely
+        if: ${{ github.event.pull_request.base.repo.id != github.event.pull_request.head.repo.id }}
+        run: |
+          echo "LABELS_NEXT=$(echo ${STEPS_ACTION_ASSIGN_LABELS_OUTPUTS_LABELS_NEXT} | tr -dc 'a-zA-Z0-9-,')" >> $GITHUB_ENV
+        env:
+          STEPS_ACTION_ASSIGN_LABELS_OUTPUTS_LABELS_NEXT: ${{ steps.action-assign-labels.outputs.labels-next }}
+      - name: "Drop warning if PR from fork"
+        if: ${{ github.event.pull_request.base.repo.id != github.event.pull_request.head.repo.id }}
+        run: |
+          {
+            echo "⚠️ Pull request from fork! ⚠️";
+            echo "Labels will not be applied to PR. Assign them manually please.";
+            echo "Labels to assign: '${LABELS_NEXT}'";
+          } >> "$GITHUB_STEP_SUMMARY"