Add Terraform configuration for ClouDNS IAC with OpenTofu integration

.github/workflows/terraform-cloudns-iac-apply.yml

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+name: Terraform CLouDNS IAC Apply
+
+on:
+  schedule:
+    - cron: "0 1 * * 0"
+  push:
+    branches:
+      - main
+    paths:
+      - "terraform/cloudns-iac/**"
+jobs:
+  opentofu-apply:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup environment
+        uses: ./.github/actions/setup-env
+
+      - name: Setup OpenTofu environment
+        uses: ./.github/actions/setup-opentofu-env
+
+      - name: OpenTofu Init and Apply
+        env:
+          BW_PROJECT_ID: ${{ secrets.BW_PROJECT_ID }}
+          BW_ORGANIZATION_ID: ${{ secrets.BW_ORGANIZATION_ID }}
+          BW_ACCESS_TOKEN: ${{ secrets.BW_ACCESS_TOKEN }}
+        run: |
+          cd terraform/cloudns-iac
+          sectool -f ../../sectool.json exec tofu init
+          sectool -f ../../sectool.json exec tofu apply --auto-approve

.github/workflows/terraform-cloudns-iac-validate-on-pr.yml

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+name: Terraform ClouDNS IAC Validate on Pull Request
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - "terraform/cloudns-iac/**"
+    types:
+      - opened
+      - synchronize
+      - reopened
+jobs:
+  terraform-validate:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup environment
+        uses: ./.github/actions/setup-env
+
+      - name: Setup OpenTofu environment
+        uses: ./.github/actions/setup-opentofu-env
+
+      - name: OpenTofu Init and Validate
+        env:
+          BW_PROJECT_ID: ${{ secrets.BW_PROJECT_ID }}
+          BW_ORGANIZATION_ID: ${{ secrets.BW_ORGANIZATION_ID }}
+          BW_ACCESS_TOKEN: ${{ secrets.BW_ACCESS_TOKEN }}
+        run: |
+          cd terraform/cloudns-iac
+          sectool -f ../../sectool.json exec tofu init
+          sectool -f ../../sectool.json exec tofu validate
+          sectool -f ../../sectool.json exec tofu fmt -check
+          sectool -f ../../sectool.json exec tofu plan