Add Symfony Deprecation Contracts package

- Created CHANGELOG.md to maintain version history.
- Added README.md with usage instructions for the trigger_deprecation() function.
- Initialized composer.json for the Symfony Deprecation Contracts library, specifying dependencies and autoloading.

modules/pshowsso/deps/composer/installed.json

@@ -1098,13 +1098,13 @@
             "source": {
                 "type": "git",
                 "url": "git@git.layersshow.com:prestashow/lib/presta-core.git",
-                "reference": "cfef8ce2507bc27d9c22920684ddcd067311797a"
+                "reference": "39712e7efb30c82b3c98a1808f7b5d55c6bbcae9"
             },
             "require": {
                 "composer-plugin-api": "^1.0|^2.0",
                 "php": ">=7.1"
             },
-            "time": "2025-11-17T18:55:01+00:00",
+            "time": "2025-11-27T19:11:27+00:00",
             "default-branch": true,
             "type": "composer-plugin",
             "extra": {