Add Jellyfin OpenAPI spec and configure generator

Package.swift

@@ -17,6 +17,9 @@ let package = Package(
             dependencies: [
                 .product(name: "OpenAPIRuntime", package: "swift-openapi-runtime"),
                 .product(name: "OpenAPIURLSession", package: "swift-openapi-urlsession"),
+            ],
+            plugins: [
+                .plugin(name: "OpenAPIGenerator", package: "swift-openapi-generator")
             ]
         ),
         .target(

Sources/LuminateCore/LuminateCore.swift

@@ -1 +1,5 @@
-public struct LuminateCore {}
+import OpenAPIURLSession
+
+public struct LuminateCore {
+    public static let version = "0.1.0"
+}

Sources/LuminateCore/openapi-generator-config.yaml

@@ -0,0 +1,3 @@
+generate:
+  - types
+  - client