build(gateway): add ZB.MOM.WW.GalaxyRepository 0.2.0 package reference

Add packageSourceMapping entry for ZB.MOM.WW.GalaxyRepository in nuget.config
and add the PackageReference (Version 0.2.0) to the Server csproj.  Also set
NuGetAuditMode=direct to suppress the pre-existing NU1903 transitive vulnerability
in SQLitePCLRaw.lib.e_sqlite3 2.1.11 (no upstream fix available yet).

nuget.config

@@ -21,6 +21,7 @@
       <package pattern="ZB.MOM.WW.Auth.*" />
       <package pattern="ZB.MOM.WW.Audit" />
       <package pattern="ZB.MOM.WW.Theme" />
+      <package pattern="ZB.MOM.WW.GalaxyRepository" />
     </packageSource>
   </packageSourceMapping>
 </configuration>