Add helper script to generate the code

scripts/generate_code.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+set -eu
+
+REPO_ROOT="$(cd ./"$(git rev-parse --show-cdup)" || exit; pwd)"
+
+DICT_NAMES=(
+  "rfc2865"
+)
+
+for DICT_NAME in "${DICT_NAMES[@]}"; do
+  cat /dev/null > "${REPO_ROOT}/src/${DICT_NAME}.rs"
+  cargo run --bin code_gen "${REPO_ROOT}/dicts/dictionary.${DICT_NAME}" "${REPO_ROOT}/src/${DICT_NAME}.rs"
+done
+
+cargo fmt
+