Go SHM API to read simple data with size from SHM name

tools/cmd/pytest/main.go

@@ -0,0 +1,20 @@
+// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package pytest
+
+import (
+	"fmt"
+
+	"kitty/tools/cli"
+	"kitty/tools/utils/shm"
+)
+
+var _ = fmt.Print
+
+func EntryPoint(root *cli.Command) {
+	root = root.AddSubCommand(&cli.Command{
+		Name:   "__pytest__",
+		Hidden: true,
+	})
+	shm.TestEntryPoint(root)
+}