feat: Add Thread-Specific Storage design pattern (#3422)

* Add Thread-Specific Storage design pattern

* fixed:pom.xml
Run 'mvn spotless:apply' to fix these violations.

* fix: address Sonar security hotspots for Random usage and e.printStackTrace()

* fixed:
Run 'mvn spotless:apply'(remove unused import)

* fixed:
Refactor Thread-Specific Storage pattern implementation to address Sonar issues: remove unnecessary instantiation, add private constructor, use diamond operator, and update tests.

* fixed:
update uml and README.md

* Trigger CI rerun

pom.xml

@@ -234,6 +234,7 @@
     <module>template-method</module>
     <module>templateview</module>
     <module>thread-pool-executor</module>
+    <module>thread-specific-storage</module>
     <module>throttling</module>
     <module>tolerant-reader</module>
     <module>trampoline</module>