Swyx Core Grundgerüst: Webhook-Service, Admin-UI und Outlook-Plugin

Initiale Projektstruktur mit Spring Boot 3.4 + Vaadin 24.6:
- Webhook-Endpoint zur Entgegennahme von Swyx-Anrufsignalisierungen
- Vaadin-basierte Admin-Oberfläche (Dashboard, Events, Login) mit
  custom Theme 'swyx-admin' und Spring-Security-Schutz (In-Memory
  Admin aus swyx.admin.*)
- Plugin-Framework mit ApplicationReadyEvent-gesteuertem Lifecycle
- Outlook-Plugin: stündlicher Kontakt-Sync via Microsoft Graph
  (Client-Credentials-Flow) mit Paging
- MongoDB-Auto-Konfiguration via spring-boot-starter-data-mongodb
- Env-basierte Konfiguration (.env / .env.example) mit Fallback-
  Defaults in application.yml

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.vscode/launch.json

@@ -0,0 +1,33 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "java",
+            "name": "Spring Boot: Swyx Core",
+            "request": "launch",
+            "cwd": "${workspaceFolder}/core",
+            "mainClass": "de.assecutor.swyx.SwyxCoreApplication",
+            "projectName": "swyx-core",
+            "args": [],
+            "vmArgs": "-Dspring.profiles.active=dev -Dspring.devtools.restart.enabled=true",
+            "env": {
+                "SERVER_PORT": "8080"
+            },
+            "console": "internalConsole"
+        },
+        {
+            "type": "java",
+            "name": "Spring Boot: Swyx Core (Production)",
+            "request": "launch",
+            "cwd": "${workspaceFolder}/core",
+            "mainClass": "de.assecutor.swyx.SwyxCoreApplication",
+            "projectName": "swyx-core",
+            "args": [],
+            "vmArgs": "-Dspring.profiles.active=prod -Dvaadin.productionMode=true",
+            "env": {
+                "SERVER_PORT": "8080"
+            },
+            "console": "internalConsole"
+        }
+    ]
+}