feat: Integrate setup behaviour

This adds options for enabling setup to the config folder.
All default configs with permanent storage (file/sparql)
are configured to require setup at server start.
Memory-based configs merely have it as an option.

config/app/setup/optional.json

@@ -0,0 +1,24 @@
+{
+  "@context": "https://linkedsoftwaredependencies.org/bundles/npm/@solid/community-server/^1.0.0/components/context.jsonld",
+  "import": [
+    "files-scs:config/app/setup/handlers/setup.json"
+  ],
+  "@graph": [
+    {
+      "comment": "Combines both the redirect and the setup.",
+      "@id": "urn:solid-server:default:SetupHandler",
+      "@type": "ConditionalHandler",
+      "storageKey": "setupCompleted-1.0",
+      "storageValue": true,
+      "storage": { "@id": "urn:solid-server:default:SetupStorage" },
+      "source": {
+        "@type": "RouterHandler",
+        "args_baseUrl": { "@id": "urn:solid-server:default:variable:baseUrl" },
+        "args_targetExtractor": { "@id": "urn:solid-server:default:TargetExtractor" },
+        "args_allowedMethods": [ "*" ],
+        "args_allowedPathNames": [ "/setup" ],
+        "args_handler": { "@id": "urn:solid-server:default:SetupHttpHandler" }
+      }
+    }
+  ]
+}