This is to enable usage of sbt-scoverage in Enterprise environments where only the valid-POM format is accepted for JAR downloads, enabling it for many teams to move from Gradle/Maven to SBT for their Scala (and even non-Scala projects)

More background here: https://github.com/esbeetee/sbt-vspp/blob/main/README.md

Right now there isn't a lot of support if you try to use coverage under
3.1.x for example. This will show you a warning that you need to update to
3.2.x if you try with a Scala 3 version that isn't new enough.

Executed command: scalafmt --non-interactive

Just fixes a small typo on the Scala 3.2.x warning.

The -Xplugin option expects a classpath string with multiple paths
separated by a semicolon or colon depending on the operating system.
However, this currently always uses a colon, which doesn't work on
Windows. This means scalac cannot find the scoverage plugin jars and
leads to errors about "bad options".

This modifies the -Xplugin logic to use File.pathSeparator when building
the Xplugin classpath, allowing it to work regardless of operating
system.

Also modifies excludedPackages when on Windows to replace Unix path
separators with Windows path separators (which are escaped because it is
treated as a regular expression). Modifies tests to remove unnecessary
escaping of Unix separators that results in an invalid regex due to this
replacement on Windows.

Note that two tests currently prevent CI from working on Windows:
coverage-off and preserve-set. The reason for these failures on Windows
is not clear, but these changes at least allow the common uses to work
on Windows.