Add auto issue labeller and dedup GitHub Actions workflows

.github/workflows/auto-issue-dedup.yaml

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+name: Auto Issue Deduplication
+
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  dedup_issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Check for duplicate issues
+        uses: pelikhan/action-genai-issue-dedup@v1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          openai-api-key: ${{ secrets.OPENAI_API_KEY }}
+          model: 'gpt-4o-mini'
+          similarity-threshold: '0.8'

.github/workflows/auto-issue-labeller.yaml

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+name: Auto Issue Labeller
+
+on:
+  issues:
+    types: [opened, edited]
+
+jobs:
+  label_issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Auto label issues
+        uses: pelikhan/action-genai-issue-labeller@v1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          openai-api-key: ${{ secrets.OPENAI_API_KEY }}
+          model: 'gpt-4o-mini'
+          labels: 'bug,feature,documentation,enhancement,question,help wanted,good first issue'