New GSP migration

[xarthurx]

Use the GSP v1.0 version for organizing P/Invoke code from the CPP side.

[Copilot]

Pull request overview

This PR migrates the project to use GSP v1.0 architecture, reorganizing the P/Invoke code structure from the C++ side. The changes establish a cleaner separation between core GSP functionality and platform-specific adapters (Rhino), introduce platform-independent geometry types, and refactor the native bridge into a more maintainable extension-based structure.

Key Changes:

• Introduced platform-independent geometry types (Vec2, Vec3, Mesh) and core utilities (Serializer, Platform, MarshalHelper)
• Reorganized namespace structure: GSP for core, GSP.Adapters.Rhino for Rhino-specific code, igMesh.Native for native bridge functions
• Updated version from 0.5.9 to 0.6.0

Reviewed changes

Copilot reviewed 33 out of 35 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
igm/*.cs (multiple files)	Added new namespace imports for GSP adapters and igMesh native bridge
igm/01_meshInfo.cs	Updated native bridge class references from GSP.NativeBridge to igMeshBridge
igm/01_meshIO.cs	Code formatting improvements and reorganization
igm/03_meshAdjacency.cs	Fixed string indentation alignment
igm/00_igmInfo.cs	Version bump to 0.6.0
GeoSharPlusNET/Wrapper.cs	Moved to GSP.Adapters.Rhino namespace
GeoSharPlusNET/NativeBridge.cs	Refactored to igMeshBridge class using new Platform utilities
GeoSharPlusNET/MeshUtils.cs	Updated to use new namespace structure and igMeshBridge
GeoSharPlusNET/Geometry/*.cs	New platform-independent geometry types
GeoSharPlusNET/Core/*.cs	New core utilities for serialization, marshaling, and platform detection
GeoSharPlusNET/Adapters/Rhino/*.cs	New Rhino adapter implementation
GeoSharPlusNET/Extensions/igMesh/*.cs	New high-level igMesh utilities and documentation
GeoSharPlusCPP/src/API/BridgeAPI.cpp	Updated include path
GeoSharPlusCPP/CMakeLists.txt	Corrected comment text