wasi preview 2 support (#4027)

* all: wasip2 support

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

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

@@ -0,0 +1,27 @@
+// Code generated by wit-bindgen-go. DO NOT EDIT.
+
+//go:build !wasip1
+
+// Package exit represents the imported interface "wasi:cli/exit@0.2.0".
+package exit
+
+import (
+	"github.com/ydnar/wasm-tools-go/cm"
+)
+
+// Exit represents the imported function "exit".
+//
+// Exit the current instance and any linked instances.
+//
+//	exit: func(status: result)
+//
+//go:nosplit
+func Exit(status cm.Result) {
+	status0 := cm.LowerResult(status)
+	wasmimport_Exit((uint32)(status0))
+	return
+}
+
+//go:wasmimport wasi:cli/exit@0.2.0 exit
+//go:noescape
+func wasmimport_Exit(status0 uint32)