Implement OAuth2 server, link oauth:Client and auth::Oauth2Client, implement permission checks

app/models/Application.model.js

@@ -0,0 +1,29 @@
+const { Model } = require('flitter-orm')
+
+class ApplicationModel extends Model {
+    static get schema() {
+        return {
+            name: String,
+            identifier: String,
+            description: String,
+            active: { type: Boolean, default: true },
+            saml_service_provider_ids: [String],
+            ldap_client_ids: [String],
+            oauth_client_ids: [String],
+        }
+    }
+
+    async to_api() {
+        return {
+            id: this.id,
+            name: this.name,
+            identifier: this.identifier,
+            description: this.description,
+            saml_service_provider_ids: this.saml_service_provider_ids,
+            ldap_client_ids: this.ldap_client_ids,
+            oauth_client_ids: this.oauth_client_ids,
+        }
+    }
+}
+
+module.exports = exports = ApplicationModel