Add release notes for 29.0.0 (#9955)

Author: alexcrichton

RELEASES.md

@@ -4,8 +4,92 @@ Unreleased.
 
 ### Added
 
+* Winch now supports epoch-based interruption.
+  [#9737](https://github.com/bytecodealliance/wasmtime/pull/9737)
+
+* Pulley, Wasmtime's WebAssembly interpreter, has seen quite a lot of progress
+  and support fleshed out. It's still not 100% complete but should be about
+  ready to start kicking the tires.
+  [#9744](https://github.com/bytecodealliance/wasmtime/pull/9744)
+
+* The Wasmtime CLI now supports a `-Wextended-const` flag to control whether the
+  `extended-const` wasm proposal is enabled or not.
+  [#9768](https://github.com/bytecodealliance/wasmtime/pull/9768)
+
+* Work continues to progress on the AArch64 Winch backend, bringing it closer to
+  completion.
+  [#9762](https://github.com/bytecodealliance/wasmtime/pull/9762)
+  [#9767](https://github.com/bytecodealliance/wasmtime/pull/9767)
+  [#9751](https://github.com/bytecodealliance/wasmtime/pull/9751)
+  [#9784](https://github.com/bytecodealliance/wasmtime/pull/9784)
+  [#9781](https://github.com/bytecodealliance/wasmtime/pull/9781)
+  [#9792](https://github.com/bytecodealliance/wasmtime/pull/9792)
+  [#9787](https://github.com/bytecodealliance/wasmtime/pull/9787)
+  [#9798](https://github.com/bytecodealliance/wasmtime/pull/9798)
+  [#9850](https://github.com/bytecodealliance/wasmtime/pull/9850)
+
+* Wasmtime now supports a "custom code publisher" which can be useful when
+  Wasmtime doesn't have built-in support for a particular environment.
+  [#9778](https://github.com/bytecodealliance/wasmtime/pull/9778)
+
+* Configuration options have been added for `wasmtime-wasi-http` outgoing
+  bodies.
+  [#9800](https://github.com/bytecodealliance/wasmtime/pull/9800)
+
+* Log prefixes can now be disabled for the `wasmtime serve` command.
+  [#9821](https://github.com/bytecodealliance/wasmtime/pull/9821)
+
+* A new `WASMTIME_LOG_NO_CONTEXT` environment variable was added to live
+  alongside `WASMTIME_LOG`.
+  [#9902](https://github.com/bytecodealliance/wasmtime/pull/9902)
+
+* Release artifacts for aarch64-musl targets are now available.
+  [#9934](https://github.com/bytecodealliance/wasmtime/pull/9934)
+
 ### Changed
 
+* Wasmtime libcalls now return whether a trap happened rather than raising a
+  trap directly to better prepare for the Pulley interpreter and an eventual
+  implementation of Wasm exception-handling.
+  [#9710](https://github.com/bytecodealliance/wasmtime/pull/9710)
+
+* Wasmtime will now use the Pulley interpreter by default on platforms that
+  are not supported by Cranelift.
+  [#9741](https://github.com/bytecodealliance/wasmtime/pull/9741)
+
+* Demangling symbols in profiling and debugging has improved to handle failures
+  to demangle C++ symbols.
+  [#9756](https://github.com/bytecodealliance/wasmtime/pull/9756)
+
+* WASI WIT files have been updated to 0.2.3.
+  [#9807](https://github.com/bytecodealliance/wasmtime/pull/9807)
+
+* Wasmtime's `bindgen!` macro in `async` mode no longer uses `#[async_trait]`
+  an instead natively uses `async fn` in traits.
+  [#9867](https://github.com/bytecodealliance/wasmtime/pull/9867)
+
+* Floats are no longer canonicalized flowing into or out of components.
+  [#9879](https://github.com/bytecodealliance/wasmtime/pull/9879)
+
+* Instance methods are now translated to static methods in DWARF translation.
+  [#9898](https://github.com/bytecodealliance/wasmtime/pull/9898)
+
+* The C API now supports debug builtins for debugging guest code.
+  [#9915](https://github.com/bytecodealliance/wasmtime/pull/9915)
+
+### Fixed
+
+* The header file for `wasmtime_instance_pre_instantiate` in the C API has been
+  fixed.
+  [#9770](https://github.com/bytecodealliance/wasmtime/pull/9770)
+
+* WebAssembly DWARF is more conservative in its GC pass during translation to
+  native DWARF.
+  [#9829](https://github.com/bytecodealliance/wasmtime/pull/9829)
+
+* Debugging intrinsics are fixed on Linux to be exported now.
+  [#9866](https://github.com/bytecodealliance/wasmtime/pull/9866)
+
 --------------------------------------------------------------------------------
 
 Release notes for previous releases of Wasmtime can be found on the respective