Complete mbedTLS cleanup - Removed all mbedTLS dependencies and updated documentation

- Moved mbedTLS directories to Trash/ (mbedtls/, mbedtls-install/, mbedtls-arm64-install/)
- Removed obsolete nostr_websocket_mbedtls.c implementation
- Updated nostr_websocket/Makefile to use OpenSSL instead of mbedTLS
- Updated nostr_websocket/README.md with OpenSSL migration notes
- Updated nostr_websocket/EXPORT_GUIDE.md with OpenSSL instructions
- All tests pass: crypto tests, static linking verification
- Build system fully functional with OpenSSL-only dependencies

nostr_websocket/Makefile

@@ -3,11 +3,11 @@
 
 CC = gcc
 CFLAGS = -Wall -Wextra -std=c99 -O2
-INCLUDES = -I. -I.. -I../mbedtls/include -I../mbedtls/tf-psa-crypto/include -I../mbedtls/tf-psa-crypto/drivers/builtin/include
-LIBS = -lm -L../mbedtls/library -lmbedtls -lmbedx509 -lmbedcrypto
+INCLUDES = -I. -I.. -I../openssl-install/include
+LIBS = -lm -L../openssl-install/lib64 -lssl -lcrypto
 
 # Source files
-WEBSOCKET_SOURCES = nostr_websocket_mbedtls.c ../cjson/cJSON.c
+WEBSOCKET_SOURCES = nostr_websocket_openssl.c ../cjson/cJSON.c
 WEBSOCKET_HEADERS = nostr_websocket_tls.h ../cjson/cJSON.h
 
 # Test programs
@@ -21,7 +21,7 @@ WEBSOCKET_OBJECTS = $(WEBSOCKET_SOURCES:.c=.o)
 
 all: $(TEST_PROGRAMS)
 
-# Test programs
+# Test programs (if test file exists)
 test_5_events_clean: test_5_events_clean.o $(WEBSOCKET_OBJECTS)
 	$(CC) -o $@ $^ $(LIBS)
 
@@ -29,11 +29,16 @@ test_5_events_clean: test_5_events_clean.o $(WEBSOCKET_OBJECTS)
 %.o: %.c $(WEBSOCKET_HEADERS)
 	$(CC) $(CFLAGS) $(INCLUDES) -c $< -o $@
 
-# Test target
-test: test_5_events_clean
-	@echo "🧪 Running WebSocket test..."
-	@echo "Press Ctrl-C to stop the test"
-	./test_5_events_clean
+# Test target (if test exists, otherwise use wss_test from tests/)
+test: 
+	@if [ -f test_5_events_clean ]; then \
+		echo "🧪 Running local WebSocket test..."; \
+		echo "Press Ctrl-C to stop the test"; \
+		./test_5_events_clean; \
+	else \
+		echo "🧪 Running WebSocket test from tests/ directory..."; \
+		cd ../tests && make wss_test && ./wss_test; \
+	fi
 
 # Clean build artifacts
 clean:
@@ -46,18 +51,21 @@ info:
 	@echo "=========================="
 	@echo "Core files:"
 	@echo "  - nostr_websocket_tls.h (header)"
-	@echo "  - nostr_websocket_mbedtls.c (implementation)"
+	@echo "  - nostr_websocket_openssl.c (OpenSSL implementation)"
 	@echo "  - ../cjson/cJSON.h/c (JSON support)"
 	@echo ""
 	@echo "Dependencies:"
-	@echo "  - mbedTLS (SSL/TLS support)"
+	@echo "  - OpenSSL (SSL/TLS support)"
 	@echo "  - Standard C libraries"
 	@echo ""
 	@echo "Usage:"
-	@echo "  make          - Build test programs"
+	@echo "  make          - Build test programs (if available)"
 	@echo "  make test     - Run WebSocket test"
 	@echo "  make clean    - Clean build artifacts"
 	@echo "  make info     - Show this information"
+	@echo ""
+	@echo "Note: This library is integrated into the main libnostr_core.a"
+	@echo "Use the tests in ../tests/ for comprehensive testing."
 
 # Help target
 help: info