Add support for Mac OS Ventura 13.2 for the M1 (ARM64 platform)

[bdurrani]

Changes

As discussed in #46

libmagic was build using file-5.41 built on a M1 running Ventura (13.2)
via the following commands

autoreconf -f -i
./configure --disable-silent-rules
make -j4

I had to add ARM64 solution configurations to get msbuild to pick the correct native library.

Unit Test output

I love how the -p option for dotnet test is not documented. Had to dig around some older issues to find the correct spell

Mime/test/MimeTests on  add-osx-arm64-support [!] via .NET v7.0.200 🎯 net6.0 took 147ms
at 16:25:51 ❯ dotnet test -p:Platform=arm64
  Determining projects to restore...
  Restored /Users/bilal.durrani/github/forks/Mime/src/Mime/Mime.csproj (in 167 ms).
  Restored /Users/bilal.durrani/github/forks/Mime/test/MimeTests/MimeTests.csproj (in 167 ms).
  Mime -> /Users/bilal.durrani/github/forks/Mime/src/Mime/bin/arm64/Debug/netstandard2.0/Mime.dll
  MimeTests -> /Users/bilal.durrani/github/forks/Mime/test/MimeTests/bin/arm64/Debug/net6.0/MimeTests.dll
  IsWindows
  IsOSX true
  IsLinux
  IsArm64 true
  IsX64
Test run for /Users/bilal.durrani/github/forks/Mime/test/MimeTests/bin/arm64/Debug/net6.0/MimeTests.dll (.NETCoreApp,Version=v6.0)
Microsoft (R) Test Execution Command Line Tool Version 17.5.0 (arm64)
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.

Passed!  - Failed:     0, Passed:    19, Skipped:     0, Total:    19, Duration: 24 ms - MimeTests.dll (net6.0)