Introducing ILSpy.ReadyToRun

[cshung]

Fixes #1864

This PR introduces ILSpy.ReadyToRun, a plugin for disassembling pre-compiled methods contained in a ready-to-run image.

The code is the same as what I wrote before arranged as a plugin.

@christophwille

[christophwille]

How about a fourth option - have the copy of the code for ILCompiler.Reflection.ReadyToRun.dll in a separate repository, and build an "xyz-branded" temporary NuGet from it that we can reference (until the official package arrives)?

Edit (because of time zone differences): yes, the intention would be that you "own" the copy in a repo of yours, and also publish that temp NuGet (can be obsoleted later) - that way you have full control over the changes & when you need them for your pull requests.

[cshung]

The changes look good to me, thanks!

[siegfriedpammer]

Are you planning on fixing/implementing all things marked TODO before merging?

[cshung]

Are you planning on fixing/implementing all things marked TODO before merging?

My hope is to merge in a minimally viable product first and then address the rest later. If you believe any of the TODOs should be addressed upfront, please let me know.

[siegfriedpammer]

Thank you very much! LGTM