Context: 46f10fe0
Context? 68368189

`tools/tmt` (46f10fe0) is a utility to print typemap entries contained
within an application.

`tools/tmt` no longer supports dumping typemap entries; it was
possibly broken in 68368189:

	% ./dotnet-local.sh build tools/tmt/*.csproj
	% ./dotnet-local.sh build -c Release samples/HelloWorld/HelloWorld/HelloWorld.DotNet.csproj
	% bin/Debug/bin/tmt samples/HelloWorld/HelloWorld/bin/Release/net9.0-android/*-Signed.apk
	No type maps found in 'samples/HelloWorld/HelloWorld/bin/Release/net9.0-android/com.xamarin.android.helloworld-Signed.apk'

Update the `tools/tmt` utility to support the current format of
typemaps within `libxamarin-app.so`, and update it to generate nicely
formatted Markdown report files instead of the text file output:

	% bin/Debug/bin/tmt samples/HelloWorld/HelloWorld/bin/Release/net9.0-android/*-Signed.apk
	samples/HelloWorld/HelloWorld/bin/Release/net9.0-android/com.xamarin.android.helloworld-Signed.apk!lib/arm64-v8a/libxamarin-app.so:
	  File Type: Xamarin App Release DSO
	  Format version: 2
	  Map kind: Release
	  Map architecture: ARM64
	  Managed to Java entries: 56
	  Java to Managed entries: 46 (without duplicates)
	…

`typemap-v2-Release-ARM64.md` will be created (among other files)
which contains the actual typemap data, in Markdown tabular form:

> # Java to Managed

> | Java type name                                     | Managed type name                                                | Type token ID         | Is Generic?      | MVID                                 |
> | -------------------------------------------------- | ---------------------------------------------------------------- | --------------------- | ---------------- | ------------------------------------ |
> | android/app/Activity                               | Android.App.Activity, Mono.Android                               | 0x02000042 (33554498) | no               | 33da2efb-61bb-4fd5-b529-2dee309a3d65 |
> …
> | java/lang/Object                                   | Java.Lang.Object, Mono.Android                                   | 0x0200008B (33554571) | no               | 33da2efb-61bb-4fd5-b529-2dee309a3d65 |
> …

> # Managed to Java

> | Managed type name                                                       | Java type name                                     | Type token ID         | Is Generic? | Is Duplicate? | MVID                                 |
> | ----------------------------------------------------------------------- | -------------------------------------------------- | --------------------- | ----------- | ------------- | ------------------------------------ |
> | HelloLibrary.LibraryActivity, HelloLibrary.DotNet                       | mono/samples/hello/LibraryActivity                 | 0x02000002 (33554434) | no          | false         | ca140934-068f-47d0-a861-6179233e49aa |
> …