feat: initial Go project scaffold with build/test/release pipeline

- Go module: github.com/netcell-it/deklarix
- cmd/server/main.go: HTTP entry point with /health endpoint
- scripts/build.sh: cross-compile amd64 + arm64
- scripts/test.sh: go vet + race tests + build-check
- scripts/release.sh: full release flow (test → build → tag → push)
- packaging/DEBIAN: .deb control template
- design/enterprise.css: enterprise design system from enconf
- CLAUDE.md: complete build/test/release documentation
- .claude/settings.local.json: Claude Code permissions

scripts/build.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# Deklarix — Build-Skript (amd64 + arm64)
+#
+# Verwendung:
+#   ./scripts/build.sh [version]          # Beide Architekturen
+#   ./scripts/build.sh [version] amd64    # Nur amd64
+#   ./scripts/build.sh [version] arm64    # Nur arm64
+#
+# Ausgabe: dist/deklarix_<version>_<arch>
+#
+# Release-Prozess:
+#   1. VERSION erhöhen (Semantic Versioning: MAJOR.MINOR.PATCH)
+#   2. ./scripts/build.sh <version>
+#   3. ./scripts/test.sh
+#   4. git tag v<version> && git push origin v<version>
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+REPO_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+VERSION="${1:-0.0.1}"
+ARCH_FILTER="${2:-both}"
+
+GRN='\033[0;32m'; BLD='\033[1m'; NC='\033[0m'
+log() { echo -e "${GRN}[build]${NC} $*"; }
+
+export PATH=$PATH:/usr/local/go/bin
+
+command -v go >/dev/null || { echo "Go nicht gefunden — PATH: $PATH"; exit 1; }
+
+mkdir -p "$REPO_DIR/dist"
+
+log "Version: $VERSION  |  Go: $(go version)"
+
+ARCHS=()
+case "$ARCH_FILTER" in
+    amd64) ARCHS=("amd64") ;;
+    arm64) ARCHS=("arm64") ;;
+    *)     ARCHS=("amd64" "arm64") ;;
+esac
+
+for ARCH in "${ARCHS[@]}"; do
+    OUT="$REPO_DIR/dist/deklarix_${VERSION}_${ARCH}"
+    log "Baue $ARCH → $OUT"
+    GOARCH=$ARCH GOOS=linux go build \
+        -ldflags="-X main.Version=${VERSION} -s -w" \
+        -o "$OUT" \
+        ./cmd/server/
+    log "$ARCH fertig: $(du -sh "$OUT" | cut -f1)"
+done
+
+log "Build abgeschlossen ✓"