fix: Rename the dev Repo config section to Modules

The section was renamed on the config class but not in the development
settings, so validation found no Modules section and the host exited with
-10 before it could serve anything locally.

Author: hhvrc

RepositoryServer/appsettings.Development.json

@@ -23,7 +23,7 @@
     "Conn": "Host=localhost;Port=5433;Database=repo-server;Username=openshock;Password=openshock"
   },
 
-  "Repo": {
+  "Modules": {
     "Id": "openshock-desktop-modules-dev",
     "Name": "OpenShock Modules (dev)",
     "Author": "OpenShock",