Refactoring enclave sample (#4828)

* refactor(ci): production-ready SGX install script with logging and idempotency

- Add comprehensive logging infrastructure to /tmp/install_sgx.log
- Implement idempotency checks for SGX packages and SDK
- Modularize into functions: platform_detect, install_packages, validate_installation, cleanup
- Add strict error handling with set -euo pipefail and error traps
- Replace FIXME with proper environment sourcing documentation
- Add dynamic platform detection for Ubuntu 20+/Debian 11/12
- Ensure minimal console output (final status only) with all details in log
- Verify all acceptance scenarios pass with comprehensive testing

* Refactoring enclave-sample aligning sgx BKM.

- Buffer interface redesign to separate input and output
- prevent untrusted pointer
- add module and instance handle release functions for better resource management

Author: lum1n0us

.gitignore

@@ -21,9 +21,9 @@ core/iwasm/libraries/lib-wasi-threads/test/*.wasm
 core/iwasm/libraries/lib-socket/test/*.wasm
 
 product-mini/app-samples/hello-world/test.wasm
-product-mini/platforms/linux-sgx/enclave-sample/App/
-product-mini/platforms/linux-sgx/enclave-sample/Enclave/
-product-mini/platforms/linux-sgx/enclave-sample/iwasm
+product-mini/platforms/linux-sgx/enclave-sample/
+!product-mini/platforms/linux-sgx/enclave-sample/App/App.*
+!product-mini/platforms/linux-sgx/enclave-sample/Enclave/Enclave.*
 
 build_out
 tests/wamr-test-suites/workspace