[codex] Add Bridge Protocol v1 named-pipe bridge

[LimiNode]

Summary

• add BridgeProtocolNamedPipeConfig and BridgeProtocolNamedPipeBridge under protocol_v1
• serve protocol.hello, protocol.capabilities.get, account.balance.get, signal.submit, and trade.open over a local named pipe
• add NDJSON framing for named-pipe JSON-RPC responses/notifications and wire tests/smoke example into CI
• update BridgeType, umbrella includes, examples docs, and bridge taxonomy
• update external/SimpleNamedPipe to [codex] Fix named pipe server partial writes SimpleNamedPipe#18 for partial server write handling

Validation

• cmake -S . -B build-codex-pr104-mingw -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=Release -DOPTIONX_BUILD_DEPS=ON -DOPTIONX_BUILD_TESTS=ON -DOPTIONX_BUILD_EXAMPLES=ON -DOPTIONX_LIGHTWEIGHT_BRIDGE_SMOKE_TESTS=ON
• cmake --build build-codex-pr104-mingw --target protocol_v1_bridge_test --parallel 1
• cmake --build build-codex-pr104-mingw --target bridge_umbrella_include_test --parallel 1
• cmake --build build-codex-pr104-mingw --target legacy_trading_bridge_test --parallel 1
• cmake --build build-codex-pr104-mingw --target protocol_v1_named_pipe_bridge_smoke --parallel 1
• .\build-codex-pr104-mingw\protocol_v1_bridge_test.exe --gtest_brief=1
• .\build-codex-pr104-mingw\bridge_umbrella_include_test.exe --gtest_brief=1
• .\build-codex-pr104-mingw\legacy_trading_bridge_test.exe --gtest_brief=1
• .\build-codex-pr104-mingw\protocol_v1_named_pipe_bridge_smoke.exe --self-test
• git diff --check