feat: add PawSQL docs examples and image CI

Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:1.24-alpine AS build
+WORKDIR /src
+COPY go.mod ./
+COPY cmd ./cmd
+COPY internal ./internal
+RUN CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /pawsql ./cmd/pawsql
+
+FROM gcr.io/distroless/static-debian12:nonroot
+COPY --from=build /pawsql /usr/local/bin/pawsql
+ENTRYPOINT ["/usr/local/bin/pawsql"]
+CMD ["--config", "/etc/pawsql/Barkfile"]