New: man-help script for --help programs

bin/man_help.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# `man` for programs that only support --help instead of a manpage
+#
+print_help() {
+  cat <<HELP
+Open a program's --help in vim
+
+Usage: $(basename $0) <cli-name>
+
+Examples:
+    $(basename $0) dust
+    $(basename $0) cargo
+HELP
+}
+
+declare -r pgm="$1"
+
+if command -v "$pgm" &>/dev/null; then
+  "$pgm" --help | nvim -R -c 'set syn=man' --
+else
+  echo "Error: No command `$pgm` found"
+  exit 1
+fi