Use a single wrapper binary for all command line tools

This is because Go has a multi megabyte overhead for its binaries

tools/cmd/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+
+	"kitty/tools/cli"
+	"kitty/tools/cmd/at"
+)
+
+func main() {
+	var root = cli.CreateCommand(&cobra.Command{
+		Use:   "kitty-tool command [command options] [command args]",
+		Short: "Fast, statically compiled implementations for various kitty command-line tools",
+	})
+	root.AddCommand(at.EntryPoint(root))
+
+	cli.Init(root)
+	if err := root.Execute(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}