Rama 0.4 adds system proxy and PAC support via WASM JavaScript runtime

Rama 0.4: System proxy and PAC support

Rama 0.4, released six weeks after 0.3, adds system proxy configuration support and PAC (Proxy Auto Configuration) via a new WASM-based JavaScript runtime. The release also introduces ttRPC support, gRPC code generation macros, HAR WebSocket export, and multiple proxy routes. SystemProxyLayer and NoProxyEnvLayer handle OS-level settings, while rama-pac evaluates PAC scripts.