🚧(addons) introduce initial Microsoft Outlook add-in support (alpha)

Provide the minimal components required to support an Outlook
add-in: user authentication, JWT retrieval, and API calls to
generate meeting links.

This implementation is an early alpha: developer experience is
limited, documentation is incomplete, and the solution is not
white-labeled.

It's too early to consider these parts ready to ship into
production.

As a result, it is currently only available within the DINUM
frontend image.

src/helm/env.d/dev-dinum/values.meet.yaml.gotmpl

@@ -162,6 +162,30 @@ frontend:
     pullPolicy: Always
     tag: "latest"
 
+  extraVolumes:
+    - name: outlook-addon-config
+      configMap:
+        name: outlook-addon-config
+    - name: outlook-addon-manifest
+      configMap:
+        name: outlook-addon-manifest
+
+  extraVolumeMounts:
+    - name: outlook-addon-config
+      mountPath: /usr/share/nginx/html/addons/outlook/config.js
+      subPath: config.js
+      readOnly: true
+    - name: outlook-addon-manifest
+      mountPath: /usr/share/nginx/html/addons/outlook/manifest.xml
+      subPath: manifest.xml
+      readOnly: true
+
+  outlookAddon:
+    enabled: true
+    baseUrl: "https://meet.127.0.0.1.nip.io"
+    appName: "Visio"
+    id: "a025f0f6-757a-4790-97f3-99c66c4a5795"
+
 ingress:
   enabled: true
   host: meet.127.0.0.1.nip.io

src/helm/env.d/dev-keycloak/values.meet.yaml.gotmpl

@@ -129,6 +129,7 @@ backend:
     ADDONS_ENABLED: True
     ADDONS_CSRF_SECRET: 'ThisIsAnExampleKeyForDevPurposeOnly'
     ADDONS_TOKEN_SECRET_KEY: 'ThisIsAnExampleKeyForDevPurposeOnly'
+    FRONTEND_IS_SILENT_LOGIN_ENABLED: False
 
   migrate:
     command: