Add a start-up event handler that, if running on Windows, suggests the
user to exclude the current installation directory from being scanned by
the Windows Defender, if it is active on the computer.

Extend the existing start-up preference page to allow the user to adjust
settings for skipping the Windows Defender exclusion check at start-up
for the current or all installations or to run it explicitly.

Fixes https://gitlab.eclipse.org/eclipse-wg/ide-wg/ide-wg-dev-funded-efforts/ide-wg-dev-funded-program-planning-council-top-issues/-/issues/20