Add Example for Loading .NET DLL in Node.js and Electron.js

[pranavwani]

Description:

This PR adds an example demonstrating how to load a .NET DLL into Node.js and Electron.js using the node-api-dotnet package.

Highlights:

• Purpose: Addresses the challenge of integrating .NET assemblies into JavaScript applications.
• Files Added: Includes an Electron app example with code for the main and renderer processes, plus an index.html.
• Instructions: A README is provided with setup and usage details.

This example serves as a practical reference for developers looking to bridge .NET and Node.js/Electron applications.

[pranavwani]

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