Code Cleanup For Extension.ts

### Is your feature request related to a problem? Please describe.

We should separate this file into more files since it's getting rather huge

### A clear and concise description of what you want to happen. Include any alternative solutions you've considered.

see review comment on https://github.com/dotnet/vscode-dotnet-runtime/pull/1898

### Describe the solution you'd like

see above

### Additional context

_No response_