Generate Windows application manifests for all executable projects

[mjcheetham]

Automatically generate the correct application manifest for Windows executable projects that we produce. The manifests are required on Windows systems newer then Windows 8 to correctly access versioning APIs that will otherwise always report "Windows 8", even on later versions.

The manifest we generate states we are compatible with all versions of Windows from 7 to 11 (inclusive).

Example manifest:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
  <assemblyIdentity version="2.0.770.50703" name="git-credential-manager-core"></assemblyIdentity>
  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
    <application>
      <!-- Windows 10 and Windows 11 -->
      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"></supportedOS>
      <!-- Windows 8.1 -->
      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"></supportedOS>
      <!-- Windows 8 -->
      <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"></supportedOS>
      <!-- Windows 7 -->
      <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"></supportedOS>
    </application>
  </compatibility>
</assembly>

Fixes #749

[ldennington]

🚀