Big build overhaul, several crash fixes

Build system moves from CMake to TypeScript (a8ee0d3)

The repo’s build pipeline was replaced with a TypeScript-based ninja generator, touching CI, dependency handling, configuration, and compile/link steps across the tree. This is a major infrastructure shift that changes how Bun is built and maintained.

Fix HTTP 304 responses hanging through proxy tunnels (ace03ea)

Bun now forces content_length = 0 for 1xx/204/304 responses even when proxy tunneling is enabled, so the client won’t wait for a body that can never arrive. This fixes long hangs during bun install behind HTTP proxies.

Fix websocket ping()/pong() no-arg behavior (0d22c69)

Calling ws.ping() or ws.pong() without arguments now sends empty control frames instead of a timestamp payload. The JS wrapper and native implementation are aligned, fixing protocol correctness and compatibility with Node’s ws behavior.

Fix crypto hash segfaults and invalid-state handling (7c00cce)

Hash.update() and Hash.digest() now validate this before dereferencing it, and detached buffers now throw a proper invalid-state error instead of crashing. The constructor also now cleanly errors when no digest method is supported.

Fix invalid this crashes in crypto/stream bindings (636c638)

Follow-up null checks were added to more native bindings that could dereference a failed jsDynamicCast, including HMAC digest, Diffie-Hellman group verifyError, and JSBufferList. This closes additional crash paths when these APIs are called with the wrong receiver.

Fix StatWatcher GC crash by switching to JSRef (2964b4a)

StatWatcher was refactored to use the standard jsc.JSRef pattern instead of an indirect strong reference, removing a thread-safety hazard during cleanup. This should prevent crashes in HandleSet::visitStrongHandles and related finalization paths.

Fix dynamic import loader propagation for attributes (8863614)

Dynamic import() records now carry through the loader selected by import attributes, which was previously populated but never applied. That fixes bundling/compile failures for cases like importing .html with { with: { type: 'text' } }.

Other misc changes

• Docs-only fixes for dynamic import examples in yaml.mdx and json5.mdx.