Fixes the standalone MCP server executables so they no longer depend on the build host's absolute playwright-core path.
The release packaging now embeds Playwright metadata during compilation and tests the extracted archive after removing access to the build tree.
Verification:
- macOS arm64: native relocation test,
--version, MCP initialize, and all 32 tools listed - Linux x64: cross-compiled with the same checked transform; native runtime test unavailable on the release host
- Windows x64: cross-compiled with the same checked transform; native runtime test unavailable on the release host