First commit to migrate the following articles from core-java:

* to core-java-lang:
  * https://www.baeldung.com/java-reflection
  * https://www.baeldung.com/java-generics
  * https://www.baeldung.com/java-eclipse-equals-and-hashcode
  * https://www.baeldung.com/java-chained-exceptions
  * https://www.baeldung.com/java-primitive-conversions //to package
  * https://www.baeldung.com/java-method-reflection
  * https://www.baeldung.com/java-enum-iteration
  * https://www.baeldung.com/java-reflection-change-annotation-params
  * https://www.baeldung.com/java-dynamic-proxies
  * https://www.baeldung.com/java-double-brace-initialization
  * https://www.baeldung.com/java-hashcode
  * https://www.baeldung.com/java-diamond-operator
  * https://www.baeldung.com/java-static (?https://github.com/eugenp/tutorials/pull/3392)
  * https://www.baeldung.com/java-comparator-comparable
  * https://www.baeldung.com/java-continue-and-break
  * https://www.baeldung.com/java-initialization
  * https://www.baeldung.com/java-nested-classes
  * https://www.baeldung.com/java-loops
  * https://www.baeldung.com/java-varargs

core-java-lang/.gitignore

@@ -0,0 +1,25 @@
+*.class
+
+0.*
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+.resourceCache
+
+# Packaged files #
+*.jar
+*.war
+*.ear
+
+# Files generated by integration tests
+backup-pom.xml
+/bin/
+/temp
+
+#IntelliJ specific
+.idea/
+*.iml