refactor: reorganize project structure with modern C++ namespace organization

- Restructure include/ and src/ directories with logical grouping
- Move core components to spore/core/ (NodeContext, NetworkManager, TaskManager, ClusterManager, ApiServer)
- Move services to spore/services/ (NodeService, NetworkService, ClusterService, TaskService)
- Move types to spore/types/ (NodeInfo, ApiTypes, Config)
- Move internal components to spore/internal/ (Globals)
- Update all #include statements to use new namespace paths
- Update platformio.ini build filters for all environments
- Update all example files to use new include paths
- Maintain backward compatibility for public API
- Improve code organization, maintainability, and scalability

This reorganization follows modern C++ project structure patterns and provides
clear separation between public API, internal implementation, and utilities.
All examples compile successfully with the new structure.

include/spore/Spore.h

@@ -0,0 +1,51 @@
+#pragma once
+
+#include <vector>
+#include <memory>
+#include <initializer_list>
+#include <utility>
+#include "core/NodeContext.h"
+#include "core/NetworkManager.h"
+#include "core/ClusterManager.h"
+#include "core/ApiServer.h"
+#include "core/TaskManager.h"
+#include "Service.h"
+
+class Spore {
+public:
+    Spore();
+    Spore(std::initializer_list<std::pair<String, String>> initialLabels);
+    ~Spore();
+
+    // Core lifecycle methods
+    void setup();
+    void begin();
+    void loop();
+
+    // Service management
+    void addService(std::shared_ptr<Service> service);
+    void addService(Service* service);
+    
+    // Access to core components
+    NodeContext& getContext() { return ctx; }
+    NetworkManager& getNetwork() { return network; }
+    TaskManager& getTaskManager() { return taskManager; }
+    ClusterManager& getCluster() { return cluster; }
+    ApiServer& getApiServer() { return apiServer; }
+
+
+private:
+    void initializeCore();
+    void registerCoreServices();
+    void startApiServer();
+
+    NodeContext ctx;
+    NetworkManager network;
+    TaskManager taskManager;
+    ClusterManager cluster;
+    ApiServer apiServer;
+
+    std::vector<std::shared_ptr<Service>> services;
+    bool initialized;
+    bool apiServerStarted;
+};