Implement meeting assistant v1

MeetingAssistant/VaultPath.cs

@@ -0,0 +1,17 @@
+namespace MeetingAssistant;
+
+public static class VaultPath
+{
+    public static string Resolve(string path)
+    {
+        var expanded = Environment.ExpandEnvironmentVariables(path);
+        if (expanded.StartsWith("~", StringComparison.Ordinal))
+        {
+            expanded = Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
+                expanded[1..].TrimStart(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar));
+        }
+
+        return Path.GetFullPath(expanded);
+    }
+}