refactor: Fix psalm issues

- Add typing for most of the services, controllers and mappers
- Add api doc for mappers
- Use vendor-bin for psalm
- Use attributes for controllers
- Fix upload of attachments

Signed-off-by: Carl Schwan <carl.schwan@nextcloud.com>

vendor-bin/psalm/composer.json

@@ -0,0 +1,10 @@
+{
+    "require-dev": {
+        "vimeo/psalm": "^6.4"
+    },
+	"config": {
+		"platform": {
+			"php": "8.1.17"
+		}
+	}
+}