wasi preview 2 support (#4027)

* all: wasip2 support

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

src/internal/wasi/cli/v0.2.0/run/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/cli/v0.2.0/run/run.exports.go

@@ -0,0 +1,19 @@
+// Code generated by wit-bindgen-go. DO NOT EDIT.
+
+//go:build !wasip1
+
+package run
+
+import (
+	"github.com/ydnar/wasm-tools-go/cm"
+)
+
+// Exports represents the caller-defined exports from "wasi:cli/run@0.2.0".
+var Exports struct {
+	// Run represents the caller-defined, exported function "run".
+	//
+	// Run the program.
+	//
+	//	run: func() -> result
+	Run func() (result cm.Result)
+}

src/internal/wasi/cli/v0.2.0/run/run.wit.go

@@ -0,0 +1,18 @@
+// Code generated by wit-bindgen-go. DO NOT EDIT.
+
+//go:build !wasip1
+
+// Package run represents the exported interface "wasi:cli/run@0.2.0".
+package run
+
+import (
+	"github.com/ydnar/wasm-tools-go/cm"
+)
+
+//go:wasmexport wasi:cli/run@0.2.0#run
+//export wasi:cli/run@0.2.0#run
+func wasmexport_Run() (result0 uint32) {
+	result := Exports.Run()
+	result0 = cm.LowerResult(result)
+	return
+}