feat: Add rebrand CI/CD workflows to main branch

- Add 72 rebrand workflow files (polkadot→pezkuwi, substrate→bizinikiwi, cumulus→pezcumulus)
- Add GitHub actions, issue templates, and configs
- Removed unnecessary workflows (fork-sync, gitspiegel, upstream-tracker, sync-templates, backport)
- Renamed zombienet test files to match new naming convention

.github/workflows/build-misc.yml

@@ -0,0 +1,130 @@
+name: Build Misc
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  isdraft:
+    uses: ./.github/workflows/reusable-isdraft.yml
+  preflight:
+    needs: isdraft
+    uses: ./.github/workflows/reusable-preflight.yml
+
+  build-runtimes-polkavm:
+    timeout-minutes: 75
+    needs: [preflight]
+    runs-on: ${{ needs.preflight.outputs.RUNNER }}
+    container:
+      image: ${{ needs.preflight.outputs.IMAGE }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Clean cargo cache to free disk space
+        run: |
+          cargo clean 2>/dev/null || true
+          rm -rf ~/.cargo/registry/cache 2>/dev/null || true
+          rm -rf ~/.cargo/git/db 2>/dev/null || true
+
+      - name: Check Rust
+        run: |
+          rustup show
+          rustup +nightly show
+
+      - name: Build
+        env:
+          BIZINIKIWI_RUNTIME_TARGET: riscv
+        id: required
+        run: cargo check -p pez-minimal-template-runtime -p zagros-runtime -p pezkuwichain-runtime -p pezkuwi-test-runtime
+      - name: Stop all workflows if failed
+        if: ${{ failure() && steps.required.conclusion == 'failure' && !github.event.pull_request.head.repo.fork }}
+        uses: ./.github/actions/workflow-stopper
+        with:
+          app-id: ${{ secrets.WORKFLOW_STOPPER_RUNNER_APP_ID }}
+          app-key: ${{ secrets.WORKFLOW_STOPPER_RUNNER_APP_KEY }}
+
+  # As part of our test fixtures we build the revive-uapi crate always with the `unstable-hostfn` feature.
+  # To make sure that it won't break for users downstream which are not setting this feature
+  # It doesn't need to produce working code so we just use a similar enough RISC-V target
+  check-revive-stable-uapi-polkavm:
+    timeout-minutes: 30
+    needs: [preflight]
+    runs-on: ${{ needs.preflight.outputs.RUNNER }}
+    container:
+      image: ${{ needs.preflight.outputs.IMAGE }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Check Rust
+        run: |
+          rustup show
+          rustup +nightly show
+
+      - name: Build
+        id: required
+        run: cargo +nightly check -p pezpallet-revive-uapi --no-default-features --target riscv64imac-unknown-none-elf -Zbuild-std=core
+      - name: Stop all workflows if failed
+        if: ${{ failure() && steps.required.conclusion == 'failure' && !github.event.pull_request.head.repo.fork }}
+        uses: ./.github/actions/workflow-stopper
+        with:
+          app-id: ${{ secrets.WORKFLOW_STOPPER_RUNNER_APP_ID }}
+          app-key: ${{ secrets.WORKFLOW_STOPPER_RUNNER_APP_KEY }}
+
+  build-pez-subkey:
+    timeout-minutes: 20
+    needs: [preflight]
+    runs-on: ${{ needs.preflight.outputs.RUNNER }}
+    container:
+      image: ${{ needs.preflight.outputs.IMAGE }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Check Rust
+        run: |
+          rustup show
+          rustup +nightly show
+
+      - name: Build
+        env:
+          SKIP_WASM_BUILD: 1
+        id: required
+        run: |
+          cd ./bizinikiwi/bin/utils/pez-subkey
+          cargo build --locked --release
+      - name: Stop all workflows if failed
+        if: ${{ failure() && steps.required.conclusion == 'failure' && !github.event.pull_request.head.repo.fork }}
+        uses: ./.github/actions/workflow-stopper
+        with:
+          app-id: ${{ secrets.WORKFLOW_STOPPER_RUNNER_APP_ID }}
+          app-key: ${{ secrets.WORKFLOW_STOPPER_RUNNER_APP_KEY }}
+
+  confirm-required-build-mipezsc-jobs-passed:
+    runs-on: ubuntu-latest
+    name: All build misc jobs passed
+    # If any new job gets added, be sure to add it to this array
+    needs: [build-runtimes-polkavm, build-pez-subkey]
+    if: always() && !cancelled()
+    steps:
+      - run: |
+          tee resultfile <<< '${{ toJSON(needs) }}'
+          FAILURES=$(cat resultfile | grep '"result": "failure"' | wc -l)
+          if [ $FAILURES -gt 0 ]; then
+            echo "### At least one required job failed ❌" >> $GITHUB_STEP_SUMMARY
+            exit 1
+          else
+            echo '### Good job! All the required jobs passed 🚀' >> $GITHUB_STEP_SUMMARY
+          fi