Solution cleanup. Implement stubs for all remaining services. Add API models. Move configuration to appsettings.

src/Configuration/ServerOptions.cs

@@ -0,0 +1,21 @@
+namespace MariesWonderland.Configuration;
+
+public sealed class ServerOptions
+{
+    public const string SectionName = "Server";
+
+    public PathsOptions Paths { get; init; } = new();
+    public DataOptions Data { get; init; } = new();
+}
+
+public sealed class PathsOptions
+{
+    public string AssetDatabase { get; init; } = string.Empty;
+    public string MasterDatabase { get; init; } = string.Empty;
+}
+
+public sealed class DataOptions
+{
+    public string LatestMasterDataVersion { get; init; } = string.Empty;
+    public string UserDataBasePath { get; init; } = string.Empty;
+}