feat: use preview to compute workspace tags from terraform (#18720)

If using dynamic parameters, workspace tags are extracted using
`coder/preview`.

archive/fs/zip.go

@@ -0,0 +1,19 @@
+package archivefs
+
+import (
+	"archive/zip"
+	"io"
+	"io/fs"
+
+	"github.com/spf13/afero"
+	"github.com/spf13/afero/zipfs"
+)
+
+// FromZipReader creates a read-only in-memory FS
+func FromZipReader(r io.ReaderAt, size int64) (fs.FS, error) {
+	zr, err := zip.NewReader(r, size)
+	if err != nil {
+		return nil, err
+	}
+	return afero.NewIOFS(zipfs.New(zr)), nil
+}