Data Exchange, DE Wrapper - Reorganisation of plugin system for Configuration Nodes...

Data Exchange, DE Wrapper - Reorganisation of plugin system for Configuration Nodes (#696)

- Added Register and UnRegister methods to DE_ConfigurationNode for managing bindings with DE_Wrapper.
- Introduced DE_MultiPluginHolder to facilitate registration of multiple configuration nodes simultaneously.
- Created new plugin factory functions for various configuration nodes (DEBREP, DEXCAF, DEGLTF, DEIGES, DEOBJ, DEPLY, DESTEP, DESTL, DEVRML) to streamline their registration with DE_Wrapper.
- Removed unnecessary DE_PluginHolder instances from individual configuration node implementations.
- Updated CMake files to include newly created source files for each configuration node.
- Implemented singleton patterns in draw commands to ensure plugins are registered only once during initialization.