ssh-import-id: add man page

pkgs/tools/admin/ssh-import-id/default.nix

@@ -4,6 +4,7 @@
 , requests
 , distro
 , makeWrapper
+, installShellFiles
 , extraHandlers ? []
 }:
 
@@ -24,8 +25,13 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     makeWrapper
+    installShellFiles
   ];
 
+  postInstall = ''
+    installManPage $src/usr/share/man/man1/ssh-import-id.1
+  '';
+
   # handlers require main bin, main bin requires handlers
   makeWrapperArgs = [ "--prefix" ":" "$out/bin" ];