.meta files not generated for generated DLLs

[robGG1997]

Describe the bug
Currently when we generate and copy Library DLLs we don't create/generate corresponding .meta files and OpenUPM release package can't pick it up without a meta file.

Steps
Steps to reproduce the behavior:

1. Generate DLLs without .meta files
2. Publish to OpenUPM
3. Import published package

Expected behavior
A working package without any compile errors.

Console errors
140+ Namespace ... can't be found

Screenshots/Video
If applicable, add screenshots or screen recordings that help visualize the issue.

Reproducible Code Snippet (if applicable):
If the issue is related to a specific piece of code, provide the relevant code snippet here.

csharp
// Your code snippet here

Desktop (please complete the following information):

• Chainsafe SDK version: 2.5.1
• Unity Version: 2021.3.22
• Operating System: Windows 11

Mobile (please complete the following information):

• Chainsafe SDK version: [e.g., 1.0.6]
• Platform: [e.g., Android/iOS]
• Device Type: [e.g., Real device or Emulator/Simulator]
• OS Version: [e.g., Android 11]

Additional context
Please add any other relevant context or information about the problem. This could include device specifications, project configuration, or any other details that might be helpful in diagnosing the issue.