wasi preview 2 support (#4027)

* all: wasip2 support

Co-authored-by: Randy Reddig <randy.reddig@fastly.com>

src/internal/wasi/io/v0.2.0/error/empty.s

@@ -0,0 +1,3 @@
+// This file exists for testing this package without WebAssembly,
+// allowing empty function bodies with a //go:wasmimport directive.
+// See https://pkg.go.dev/cmd/compile for more information.

src/internal/wasi/io/v0.2.0/error/error.wit.go

@@ -0,0 +1,73 @@
+// Code generated by wit-bindgen-go. DO NOT EDIT.
+
+//go:build !wasip1
+
+// Package ioerror represents the imported interface "wasi:io/error@0.2.0".
+package ioerror
+
+import (
+	"github.com/ydnar/wasm-tools-go/cm"
+)
+
+// Error represents the imported resource "wasi:io/error@0.2.0#error".
+//
+// A resource which represents some error information.
+//
+// The only method provided by this resource is `to-debug-string`,
+// which provides some human-readable information about the error.
+//
+// In the `wasi:io` package, this resource is returned through the
+// `wasi:io/streams/stream-error` type.
+//
+// To provide more specific error information, other interfaces may
+// provide functions to further "downcast" this error into more specific
+// error information. For example, `error`s returned in streams derived
+// from filesystem types to be described using the filesystem's own
+// error-code type, using the function
+// `wasi:filesystem/types/filesystem-error-code`, which takes a parameter
+// `borrow<error>` and returns
+// `option<wasi:filesystem/types/error-code>`.
+//
+// The set of functions which can "downcast" an `error` into a more
+// concrete type is open.
+//
+//	resource error
+type Error cm.Resource
+
+// ResourceDrop represents the imported resource-drop for resource "error".
+//
+// Drops a resource handle.
+//
+//go:nosplit
+func (self Error) ResourceDrop() {
+	self0 := cm.Reinterpret[uint32](self)
+	wasmimport_ErrorResourceDrop((uint32)(self0))
+	return
+}
+
+//go:wasmimport wasi:io/error@0.2.0 [resource-drop]error
+//go:noescape
+func wasmimport_ErrorResourceDrop(self0 uint32)
+
+// ToDebugString represents the imported method "to-debug-string".
+//
+// Returns a string that is suitable to assist humans in debugging
+// this error.
+//
+// WARNING: The returned string should not be consumed mechanically!
+// It may change across platforms, hosts, or other implementation
+// details. Parsing this string is a major platform-compatibility
+// hazard.
+//
+//	to-debug-string: func() -> string
+//
+//go:nosplit
+func (self Error) ToDebugString() (result string) {
+	self0 := cm.Reinterpret[uint32](self)
+	wasmimport_ErrorToDebugString((uint32)(self0), &result)
+	return
+}
+
+//go:wasmimport wasi:io/error@0.2.0 [method]error.to-debug-string
+//go:noescape
+func wasmimport_ErrorToDebugString(self0 uint32, result *string)