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/release/build-linux-release.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+# This is used to build our binaries:
+# - pezkuwi
+# - pezkuwi-teyrchain
+# - pezkuwi-omni-node
+#
+# set -e
+
+BIN=$1
+PACKAGE=${2:-$BIN}
+# must be given as feature1,feature2,feature3...
+FEATURES=$3
+if [ -n "$FEATURES" ]; then
+  FEATURES="--features ${FEATURES}"
+fi
+
+PROFILE=${PROFILE:-production}
+ARTIFACTS=/artifacts/$BIN
+
+echo "Artifacts will be copied into $ARTIFACTS"
+mkdir -p "$ARTIFACTS"
+
+git log --pretty=oneline -n 1
+time cargo build --profile $PROFILE --locked --verbose --bin $BIN --package $PACKAGE $FEATURES
+
+echo "Artifact target: $ARTIFACTS"
+
+cp ./target/$PROFILE/$BIN "$ARTIFACTS"
+pushd "$ARTIFACTS" > /dev/null
+sha256sum "$BIN" | tee "$BIN.sha256"
+chmod a+x "$BIN"
+VERSION="$($ARTIFACTS/$BIN --version)"
+EXTRATAG="$(echo "${VERSION}" |
+    sed -n -r 's/^'$BIN' ([0-9.]+.*-[0-9a-f]{7,13})-.*$/\1/p')"
+EXTRATAG="${VERSION}-${EXTRATAG}-$(cut -c 1-8 $ARTIFACTS/$BIN.sha256)"
+
+echo "$BIN version = ${VERSION} (EXTRATAG = ${EXTRATAG})"
+echo -n ${VERSION} > "$ARTIFACTS/VERSION"
+echo -n ${EXTRATAG} > "$ARTIFACTS/EXTRATAG"