Added Visual Studio Codium workspace, NuGet configuration and updated the submodules

.gitignore

@@ -0,0 +1,37 @@
+NuclexSupportConfig.cmake
+
+# Visual Studio Codium
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Visual Studio
+.vs/
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+*.userprefs
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Artifacts
+[Bb]in/
+[Oo]bj/