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

.gitignore

@@ -0,0 +1,30 @@
+# Build output
+dist/
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+*.out
+
+# Go workspace
+go.work
+go.work.sum
+
+# Environment
+.env
+.env.local
+*.local
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db