feat: Adds Github actions to add the label using slash command

.github/workflows/auto-label.yml

@@ -0,0 +1,64 @@
+name: Devtron-auto-labeller
+
+on:
+  issue_comment:
+    types: [created]
+
+
+jobs:
+  manage-labels:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+
+      - name: Install GitHub CLI
+        run: |
+          sudo apt-get install -y jq
+          curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg | sudo dd of=/usr/share/keyrings/githubcli-archive-keyring.gpg
+          echo "deb [signed-by=/usr/share/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | sudo tee /etc/apt/sources.list.d/github-cli.list > /dev/null
+          sudo apt update && sudo apt install gh -y
+
+      - name: Authenticate with GitHub CLI
+        run: |
+          echo ${{ secrets.GITHUB_TOKEN }} | gh auth login --with-token
+
+      - name: Parse and manage labels
+        run: |
+          set -e
+          set -x  # Enable debugging
+
+          # Extract comment on  body and issue number
+          COMMENT_BODY=$(jq -r '.comment.body' "$GITHUB_EVENT_PATH")
+          ISSUE_NUMBER=$(jq -r '.issue.number // .pull_request.number' "$GITHUB_EVENT_PATH")
+
+          # Get the existing labels on the issue 
+          EXISTING_LABELS=$(gh issue view "$ISSUE_NUMBER" --json labels -q '.labels[].name')
+
+          # Add Label 
+          if [[ "$COMMENT_BODY" =~ ^/([^ ]+)$ ]]; then
+            LABEL_NAME="${COMMENT_BODY:1}"
+
+            # check for already existing labels in reppo
+            if gh label list --json name -q '.[].name' | grep -q "^$LABEL_NAME$"; then
+              # Add the requested label, keeping existing ones intact
+              gh issue edit "$ISSUE_NUMBER" --add-label "$LABEL_NAME"
+              echo "Successfully added label '$LABEL_NAME' to issue #$ISSUE_NUMBER."
+            else
+              echo "The label '$LABEL_NAME' doesn't exist in the repository. You may need to create a label first."
+            fi
+          fi
+
+          # Remove Label Logic
+          if [[ "$COMMENT_BODY" =~ ^/remove[[:space:]](.+)$ ]]; then
+            LABEL_NAME_TO_REMOVE=$(echo "$COMMENT_BODY" | sed -n 's|/remove ||p')
+
+            # Remove the specified label
+            if echo "$EXISTING_LABELS" | grep -q "^$LABEL_NAME_TO_REMOVE$"; then
+              gh issue edit "$ISSUE_NUMBER" --remove-label "$LABEL_NAME_TO_REMOVE"
+              echo "Successfully removed label '$LABEL_NAME_TO_REMOVE' from issue #$ISSUE_NUMBER."
+            else
+              echo "The label '$LABEL_NAME_TO_REMOVE' is not attached to issue #$ISSUE_NUMBER."
+            fi
+          fi