feat: add save_file.sh (#25)

tools/save_file.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+set -e
+
+# @describe Saves the contents to a file called `file_name` and returns the file path if successful.
+# @option --file-name! The name of the file to save to.
+# @option --contents! The contents to save.
+
+main() {
+    base_dir="$LLM_FUNCTIONS_DIR/tmp/files"
+    output_file="$base_dir/$argc_file_name"
+    mkdir -p "$base_dir"
+    echo "$argc_contents" > "$output_file"
+    echo "$output_file"
+}
+
+eval "$(argc --argc-eval "$0" "$@")"