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/scripts/parse-zombienet-tests.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+
+"""
+Zombienet Test Matrix Parser
+
+This script parses YAML test definition files and converts them to JSON format
+for use as GitHub Actions matrix jobs. It provides filtering capabilities to:
+
+1. Exclude flaky tests (unless a specific test pattern is provided)
+2. Filter tests by name pattern for targeted execution
+3. Convert YAML test definitions to JSON matrix format
+
+The script is used by GitHub Actions workflows to dynamically generate
+test matrices based on YAML configuration files, enabling flexible
+test execution and maintenance.
+
+Usage:
+    python parse-zombienet-tests.py --matrix tests.yml [--flaky-tests flaky.txt] [--test-pattern pattern]
+
+Output:
+    JSON array of test job objects suitable for GitHub Actions matrix strategy
+"""
+
+import argparse
+import yaml
+import json
+import re
+
+def parse_args():
+    parser = argparse.ArgumentParser(description="Parse test matrix YAML file with optional filtering")
+    parser.add_argument("--matrix", required=True, help="Path to the YAML matrix file")
+    parser.add_argument("--flaky-tests", default="", help="Newline-separated list of flaky job names")
+    parser.add_argument("--test-pattern", default="", help="Regex pattern to match job_name")
+    return parser.parse_args()
+
+def load_jobs(matrix_path):
+    with open(matrix_path, "r") as f:
+        return yaml.safe_load(f)
+
+def filter_jobs(jobs, flaky_tests, test_pattern):
+    flaky_set = set(name.strip() for name in flaky_tests.splitlines() if name.strip())
+    filtered = []
+
+    for job in jobs:
+        name = job.get("job-name", "")
+
+        # If test_pattern provided then don't care about flaky tests, just check test_pattern
+        if test_pattern and len(test_pattern) > 0:
+            if re.search(test_pattern, name):
+                filtered.append(job)
+        elif name not in flaky_set:
+            filtered.append(job)
+
+    return filtered
+
+def main():
+    args = parse_args()
+    jobs = load_jobs(args.matrix)
+    result = filter_jobs(jobs, args.flaky_tests, args.test_pattern)
+    print(json.dumps(result))
+
+if __name__ == "__main__":
+    main()