wasi preview 2 support (#4027)

* all: wasip2 support

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

src/internal/wasi/cli/v0.2.0/terminal-stdin/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/terminal-stdin/terminal-stdin.wit.go

@@ -0,0 +1,31 @@
+// Code generated by wit-bindgen-go. DO NOT EDIT.
+
+//go:build !wasip1
+
+// Package terminalstdin represents the imported interface "wasi:cli/terminal-stdin@0.2.0".
+//
+// An interface providing an optional `terminal-input` for stdin as a
+// link-time authority.
+package terminalstdin
+
+import (
+	"github.com/ydnar/wasm-tools-go/cm"
+	terminalinput "internal/wasi/cli/v0.2.0/terminal-input"
+)
+
+// GetTerminalStdin represents the imported function "get-terminal-stdin".
+//
+// If stdin is connected to a terminal, return a `terminal-input` handle
+// allowing further interaction with it.
+//
+//	get-terminal-stdin: func() -> option<terminal-input>
+//
+//go:nosplit
+func GetTerminalStdin() (result cm.Option[terminalinput.TerminalInput]) {
+	wasmimport_GetTerminalStdin(&result)
+	return
+}
+
+//go:wasmimport wasi:cli/terminal-stdin@0.2.0 get-terminal-stdin
+//go:noescape
+func wasmimport_GetTerminalStdin(result *cm.Option[terminalinput.TerminalInput])