📝 Add docstrings to add-utils

Docstrings generation was requested by @HammerHam.

* #72 (comment)

The following files were modified:

* `simple_utils.py`

Author: coderabbitai[bot]

simple_utils.py

@@ -0,0 +1,37 @@
+# simple_utils.py - A tiny utility library
+
+def reverse_string(text):
+    """
+    Return a new string with the characters of the input string in reverse order.
+    
+    Parameters:
+        text (str): The string to be reversed.
+    
+    Returns:
+        str: The reversed string.
+    """
+    return text[::-1]
+
+def count_words(sentence):
+    """
+    Count the number of words in a sentence by splitting on whitespace.
+    
+    Parameters:
+        sentence (str): The input string to analyze.
+    
+    Returns:
+        int: The number of words found in the sentence.
+    """
+    return len(sentence.split())
+
+def celsius_to_fahrenheit(celsius):
+    """
+    Convert a temperature from Celsius to Fahrenheit.
+    
+    Parameters:
+        celsius (float): Temperature value in degrees Celsius.
+    
+    Returns:
+        float: Equivalent temperature in degrees Fahrenheit.
+    """
+    return (celsius * 9/5) + 32