feat: обозначил аргументы командной строки

src/markov.py

@@ -1,5 +1,22 @@
+import rulesparser
+import rulebook
+import argparse
+
 def main():
-    raise NotImplementedError("Sorry, this project is WIP and didn't implement user functionality yet")
+    parser = argparse.ArgumentParser(
+            prog = "Markov",
+            description = "Simple tool to apply Markov's normal algorithms"
+            )
+    parser.add_argument("rulebook", type=str, help="File with the rules for algorithm")
+    parser.add_argument("-c", "--command-line-input", type=str, nargs='?',
+                        help="Takes input from user via command line "
+                        "arguments. There should be only one string. "
+                        "Please, use quotation marks")
+    parser.add_argument("-v", "--verbose", action="store_true",
+                        help="If set, verbose output will be produced. "
+                        "It'll contain all intermediate transformations, "
+                        "reason of stop etc.")
+    parser.parse_args()
 
 if __name__ == "__main__":
     main()