add vsdconfig files to artifacts, add link to doc

schedule builds every month so there are always artifacts

fix artifact paths

fix typo

fix multi line cmd line

add quotes to cmd line

fix ldc version in workflow

add github workflow

build MagoNatDE for x64

magogc: support dmd 2.112

mago-mi: allow creating IDiaDataSource by loading msdia140.dll explicitly

add support for changed GC interface in dmd 2.111

fix freeze with some incomplete debug info used to show stack

fix #36 add support for bitfields

don't propagate error on item in list of items, show error string instead