Adding new project 'TUI'

I couldn't decide if CLI would implement a more traditional, unix-ish
commandline tool style or if I wanted a more stylish, TUI design, so I
separated those into two different projects.

TUI/obj/project.nuget.cache

@@ -0,0 +1,10 @@
+{
+  "version": 2,
+  "dgSpecHash": "Dg+73Jb1eWPBzk18gx5TgWX3ayrK3OoKoeFgSfCFI5vwvLlQpG3DwcHE+BGFZm2nZGQQWzZOzxIWaq33uUfOWA==",
+  "success": true,
+  "projectFilePath": "/home/typo/Projects/Windows-Password-Manager/TUI/TUI.csproj",
+  "expectedPackageFiles": [
+    "/home/typo/.nuget/packages/microsoft.aspnetcore.app.ref/7.0.3/microsoft.aspnetcore.app.ref.7.0.3.nupkg.sha512"
+  ],
+  "logs": []
+}