Add support for logging assembly loads logging

[JanKrivanek]

Related to: https://github.com/dotnet/msbuild/issues/6303 Feature in MSBuild: https://github.com/dotnet/msbuild/pull/8316

Context

Adding support for showing assembly load events, prduced by the MSBuild. There is no special treating of the events - they get disaplayed as text message. For sample messages, see the MSBuild PR listed at top. Sample viewer screenshot:

[JanKrivanek]

@KirillOsenkov Do you have any quick thoughts why the same events are sometimes displayed as Message sometimes as Property?

The Property display happens for MSBuild tasks (indicated by BuildEventCotnext).

Unless this is expected or unless there might be some obvious reason for that I'll of cource investigate closer (I just wanted to see if I'm not missing anything)

[KirillOsenkov]

it looks for space, equals, space to guess whether it’s a property :) The Version = string sometimes contains spaces and sometimes doesn’t :) We can tune the heuristic to account for this case. It ‘s in MessageProcessor.cs somewhere.

[JanKrivanek]

Thank you @KirillOsenkov! It got me into the right direction - the fix proposal: https://github.com/KirillOsenkov/MSBuildStructuredLog/pull/654

Something that seems strange to me now is that those messages do not appear in the search results:

Do you have any idea for reason for that?

[KirillOsenkov]

yes you need to intern the strings in a special way to include them in search, look for Intern() methods used everywhere in Construction.cs and MessageProcessor.cs

[JanKrivanek]

Thank you! Works like a charm now! ;-) (https://github.com/KirillOsenkov/MSBuildStructuredLog/pull/654)