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.

platformio.ini

@@ -30,9 +30,11 @@ board_build.flash_size = 1M
 lib_deps = ${common.lib_deps}
 build_src_filter = 
     +<examples/base/*.cpp>
-    +<src/*.c>
-    +<src/*.cpp>
-    +<src/services/*.cpp>
+    +<src/spore/*.cpp>
+    +<src/spore/core/*.cpp>
+    +<src/spore/services/*.cpp>
+    +<src/spore/types/*.cpp>
+    +<src/internal/*.cpp>
 
 [env:d1_mini]
 platform = platformio/espressif8266@^4.2.1
@@ -45,9 +47,11 @@ board_build.flash_size = 4M
 lib_deps = ${common.lib_deps}
 build_src_filter = 
     +<examples/base/*.cpp>
-    +<src/*.c>
-    +<src/*.cpp>
-    +<src/services/*.cpp>
+    +<src/spore/*.cpp>
+    +<src/spore/core/*.cpp>
+    +<src/spore/services/*.cpp>
+    +<src/spore/types/*.cpp>
+    +<src/internal/*.cpp>
 
 [env:esp01_1m_relay]
 platform = platformio/espressif8266@^4.2.1
@@ -61,9 +65,11 @@ board_build.flash_size = 1M
 lib_deps = ${common.lib_deps}
 build_src_filter = 
     +<examples/relay/*.cpp>
-    +<src/*.c>
-    +<src/*.cpp>
-    +<src/services/*.cpp>
+    +<src/spore/*.cpp>
+    +<src/spore/core/*.cpp>
+    +<src/spore/services/*.cpp>
+    +<src/spore/types/*.cpp>
+    +<src/internal/*.cpp>
 
 [env:esp01_1m_neopixel]
 platform = platformio/espressif8266@^4.2.1