add CLAUDE.md for AI consumption and direction

Author: cconlon

CLAUDE.md

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+# Building wolfCrypt JNI/JCE (wolfcryptjni)
+- If on Linux "cp makefile.linux makefile", if on macOS "cp makefile.macosx makefile"
+- To build the native JNI shared library run "make"
+- To build the Java JAR library and examples run "ant build-jce-debug"
+
+# Running JUnit tests
+- To run JUnit tests run "ant test"
+- All tests should pass without problems
+
+# Code Style
+- Keep lines under 80 characters maximum length
+- MUST only use multi-line comments, no "//" style ones
+- MUST remove all trailing white space
+- Use 4 spaces for one tab, no hard tabs
+
+# Source Code Organization
+- The source code is organized into the following directories:
+  + jni: JNI source files
+  + jni/include: JNI header files
+  + src/main/java: Java source code
+  + src/main/java/com/wolfssl/wolfcrypt: com.wolfssl.wolfcrypt package JNI layer source code
+  + src/main/java/com/wolfssl/provider/jce: com.wolfssl.provider.jce package wolfCrypt JCE provider source code
+  + src/test: JUnit test code
+  + src/test/java/com/wolfssl/wolfcrypt/test: com.wolfssl.wolfcrypt thin JNI wrapper JUnit test code
+  + src/test/java/com/wolfssl/provider/jce/test: com.wolfssl.provider.jce wolfCrypt JCE provider JUnit test code
+  + build.xml: Ant build file
+  + pom.xml: Maven build file
+  + docs: Documentation files
+  + docs/design: Design files
+  + docs/javadoc: Generated Javadoc file location
+  + scripts/infer.sh: Script to run Facebook Infer static analysis
+  + IDE/Android: Android Studio example project files
+  + IDE/WIN: Visual Studio solution file
+  + examples: examples directory
+
+# Workflow
+- Make sure package compiles and all JUnit tests pass when you are making code changes
+- Maintain minimum Java compatibility down to Java 8
+
+# Example Code Guidelines for Writing New Code
+- All examples are placed under the "examples" directory
+- Directory "examples" contains JNI-level examples
+- Directory "examples/provider" contains JCE-level examples
+- All examples should have two files:
+  + Example.java: Java source code
+  + Example.sh: Shell script to run the example
+- Examples will be run from the root directory
+- Example .jks files are located under "examples/certs"
+- Example .wk files are located under "examples/certs"
+- Example .jks files are updated using the update-jks-wks.sh script