Updated test cases documentation

docs/test_cases/t30001.md

@@ -0,0 +1,56 @@
+# t30001 - Basic package diagram test case
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t30001_package:
+    type: package
+    glob:
+      - ../../tests/t30001/t30001.cc
+    include:
+      namespaces:
+        - clanguml::t30001
+    exclude:
+      namespaces:
+        - clanguml::t30001::detail
+    using_namespace:
+      - clanguml::t30001
+    plantuml:
+      before:
+        - "' t30001 test package diagram"
+      after:
+        - "note right of @A(A::AA::AAA): A AAA note..."
+```
+## Source code
+File t30001.cc
+```cpp
+
+namespace clanguml {
+namespace t30001 {
+namespace A {
+namespace AA {
+namespace AAA {
+} // namespace AAA
+namespace BBB {
+} // namespace BBB
+} // namespace AA
+namespace BB {
+} // namespace BB
+} // namespace A
+namespace B {
+namespace AA {
+namespace AAA {
+} // namespace AAA
+namespace BBB {
+} // namespace BBB
+} // namespace AA
+namespace BB {
+} // namespace BB
+} // namespace B
+}
+}
+
+```
+## Generated UML diagrams
+![t30001_package](./t30001_package.png "Basic package diagram test case")