Initial commit: Add NaaS (No as a Service) implementation

Add complete NaaS HTTP service implementation with:
- Pure Rust implementation using only standard library
- Multiple response formats (text, JSON, XML, YAML, boolean)
- Embedded web frontend with mobile-responsive design
- Container support with Podman/Docker
- Systemd service configuration
- Health check endpoint
- CORS support

The service always responds with "no" in various formats,
optimized for minimal binary size (~1MB) and fast response times.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Containerfile

@@ -0,0 +1,56 @@
+# Build stage
+FROM docker.io/rust:1-alpine AS builder
+
+# Install build dependencies
+RUN apk add --no-cache musl-dev
+
+WORKDIR /app
+
+# Copy manifests
+COPY Cargo.toml ./
+
+# Create dummy main.rs for dependency caching
+RUN mkdir src && echo "fn main() {}" > src/main.rs
+
+# Build dependencies
+RUN cargo build --release
+RUN rm -rf src
+
+# Copy source code
+COPY src ./src
+
+# Touch main.rs to ensure rebuild
+RUN touch src/main.rs
+
+# Build the application
+RUN cargo build --release
+
+# Runtime stage
+FROM docker.io/alpine:latest
+
+# Install runtime dependencies
+RUN apk add --no-cache ca-certificates
+
+# Create non-root user
+RUN adduser -D -u 1000 naas
+
+WORKDIR /app
+
+# Copy binary from builder
+COPY --from=builder /app/target/release/naas /app/naas
+RUN chmod +x /app/naas
+
+# Change ownership
+RUN chown -R naas:naas /app
+
+USER naas
+
+# Expose port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1
+
+# Run the application
+CMD ["./naas"]