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/zombienet-env

@@ -0,0 +1,27 @@
+# zombienet settings
+ZOMBIENET_PROVIDER=native
+ZOMBIENET_IMAGE_FOR_NATIVE=docker.io/paritytech/zombienet:v1.3.133
+ZOMBIENET_DEFAULT_RUNNER_FOR_NATIVE=parity-zombienet-native-default
+ZOMBIENET_LARGE_RUNNER_FOR_NATIVE=parity-zombienet-native-large
+ZOMBIENET_DEFAULT_RUNNER_FOR_NATIVE_PERSISTENT=parity-zombienet-native-default-persistent
+ZOMBIENET_LARGE_RUNNER_FOR_NATIVE_PERSISTENT=parity-zombienet-native-large-persistent
+ZOMBIENET_IMAGE_FOR_K8S=docker.io/paritytech/zombienet:v1.3.133
+ZOMBIENET_RUNNER_FOR_K8S=parity-zombienet
+DEBUG=zombie,zombie::network-node,zombie::kube::client::logs
+
+# zombienet-sdk settings
+ZOMBIE_PROVIDER=native
+ZOMBIENET_SDK_IMAGE_FOR_NATIVE=docker.io/paritytech/ci-unified:bullseye-1.84.1-2025-01-28-v202502131220
+ZOMBIENET_SDK_DEFAULT_RUNNER_FOR_NATIVE=parity-zombienet-native-default
+ZOMBIENET_SDK_LARGE_RUNNER_FOR_NATIVE=parity-zombienet-native-large
+ZOMBIENET_SDK_DEFAULT_RUNNER_FOR_NATIVE_PERSISTENT=parity-zombienet-native-default-persistent
+ZOMBIENET_SDK_LARGE_RUNNER_FOR_NATIVE_PERSISTENT=parity-zombienet-native-large-persistent
+ZOMBIENET_SDK_IMAGE_FOR_K8S=docker.io/paritytech/zombienet:v1.3.133
+ZOMBIENET_SDK_RUNNER_FOR_K8S=parity-zombienet
+RUST_LOG=info,zombienet_orchestrator=trace,cumulus_zombienet_sdk_helpers=debug
+
+# common settings
+PUSHGATEWAY_URL=http://prometheus-pushgateway.monitoring.svc.cluster.local:9091/metrics/job/zombie-metrics
+KUBERNETES_CPU_REQUEST=512m
+KUBERNETES_MEMORY_REQUEST=1Gi
+TEMP_IMAGES_BASE=europe-docker.pkg.dev/parity-ci-2024/temp-images