Add jep511 module: module import declarations on JDK 25 and 27

Runnable sources, deliberate compile failures, three small modules and nine captured transcripts for import module (JEP 511).

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a

jep511/src/CompactAmbiguous.java

@@ -0,0 +1,6 @@
+import module java.sql;
+
+void main() {
+    Date d = new Date(0L);      // implicit java.base (java.util.Date) vs explicit java.sql (java.sql.Date)
+    IO.println(d.getClass().getName());
+}