feat(immich_frame): add multi-account support via Accounts list option

- Add Accounts list schema to config.yaml for multi-account support
- Make ApiKey and ImmichServerUrl optional when using Accounts list
- Generate Settings.yaml from addon options in 99-run.sh
- Fix /app/Config symlink direction for proper config persistence
- Set IMMICHFRAME_CONFIG_PATH for reliable config discovery
- Update README with multi-account documentation and examples
- Bump version to 1.0.32.0-2

Co-authored-by: alexbelgium <44178713+alexbelgium@users.noreply.github.com>

immich_frame/config.yaml

@@ -9,19 +9,23 @@ map:
   - addon_config:rw
 name: Immich Frame
 options:
+  Accounts: []
   env_vars: []
 ports:
   8080/tcp: 8171
 ports_description:
   8080/tcp: Web UI port
 schema:
+  Accounts:
+    - ImmichServerUrl: str
+      ApiKey: str
   env_vars:
     - name: match(^[A-Za-z0-9_]+$)
       value: str?
-  ApiKey: str
-  ImmichServerUrl: str
+  ApiKey: str?
+  ImmichServerUrl: str?
   TZ: str?
 slug: immich_frame
 url: https://github.com/alexbelgium/hassio-addons
-version: "1.0.32.0"
+version: "1.0.32.0-2"
 webui: http://[HOST]:[PORT:8080]