Implement cowsay command-line tool

- Create cow.py with argparse for command-line argument parsing
- Support dynamic animal selection with --animal flag (defaults to "cow")
- Accept message as positional arguments and join them
- Use getattr() to dynamically call animal functions from cowsay library
- Fetch available animals from cowsay.CHARS instead of hardcoding
- Add requirements.txt with cowsay dependency

Author: Iswanna

implement-cowsay/cow.py

@@ -0,0 +1,21 @@
+import argparse
+import cowsay
+
+available_animals = cowsay.CHARS
+
+parser = argparse.ArgumentParser(prog="cowsay")
+parser.add_argument("message", nargs="+", help="What the animal will say")
+parser.add_argument(
+    "--animal",
+    choices=available_animals.keys(),
+    default="cow",
+    help="The animal that will say the word",
+)
+
+args = parser.parse_args()
+
+message_joined = " ".join(args.message)
+
+animal = args.animal
+
+getattr(cowsay, animal)(message_joined)

implement-cowsay/requirements.txt

@@ -0,0 +1 @@
+cowsay