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/paragonie/random-lib/psalm.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<psalm
+    name="Example Psalm config with recommended defaults"
+    useDocblockTypes="true"
+    totallyTyped="true"
+>
+    <projectFiles>
+        <directory name="lib" />
+    </projectFiles>
+
+    <issueHandlers>
+        <DocblockTypeContradiction errorLevel="suppress" />
+        <MoreSpecificImplementedParamType errorLevel="suppress" />
+        <PossiblyNullPropertyAssignmentValue errorLevel="suppress" />
+        <RedundantConditionGivenDocblockType errorLevel="suppress" />
+        <UndefinedClass errorLevel="suppress" /><!-- Windows only -->
+    </issueHandlers>
+</psalm>