[IGNORE for now] add a small test program to get il offset + metadata tokens

[Swatinem]

Please ignore this, its just for experimentation so far ;-)

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- Capture Debug Images and StackFrame fields for Portable PDB symbolication ([#1785](https://github.com/getsentry/sentry-dotnet/pull/1785))

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[mattjohnsonpint]

Thanks for all your hard work on this! I've merged in main to catch up this branch. I'll review in further detail and update failing tests, etc. as soon as time allows. 👍

[vaind]

I've rebased this PR but in the end decided to replace the PR as the approach may end up different, due to the lack of default interface method support this PR relied on. Also, want to keep the new PR as a draft to avoid spamming everyone before it's ready.

replaced by #2050