- Introduce build-sdk.sh script to orchestrate complete TypePHP WASI SDK building
- Add numeric-smoke-test.cc and link-numeric-smoke-test.sh for GMP/MPFR/mpdecimal validation
- Create high-precision.php example demonstrating bigInt/bigFloat/decimal usage
- Add test-typephp-program.sh for WASI integration testing with wasmtime
- Update ABI version from v2 to v4 and expand included system libraries
- Document new SDK build process and updated extension list in WASI_BUILD.md
- Include zlib, sodium, openssl, libxml, sqlite3, zip