[py] Update docstring and comments in keys.py (#16187)

Co-authored-by: Corey Goldberg <[email protected]>

Author: Aidoni0797

py/selenium/webdriver/common/keys.py

@@ -14,11 +14,16 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+
 """The Keys implementation."""
 
 
 class Keys:
-    """Set of special keys codes."""
+    """Set of special key codes for input actions.
+
+    Primarily intended for keyboard usage, but also applied in other contexts
+    such as Action Chains and IME interactions.
+    """
 
     NULL = "\ue000"
     CANCEL = "\ue001"  # ^break
@@ -58,7 +63,8 @@ class Keys:
     SEMICOLON = "\ue018"
     EQUALS = "\ue019"
 
-    NUMPAD0 = "\ue01a"  # number pad keys
+    # Keys representing number pad digits
+    NUMPAD0 = "\ue01a"  
     NUMPAD1 = "\ue01b"
     NUMPAD2 = "\ue01c"
     NUMPAD3 = "\ue01d"
@@ -68,14 +74,16 @@ class Keys:
     NUMPAD7 = "\ue021"
     NUMPAD8 = "\ue022"
     NUMPAD9 = "\ue023"
+    
     MULTIPLY = "\ue024"
     ADD = "\ue025"
     SEPARATOR = "\ue026"
     SUBTRACT = "\ue027"
     DECIMAL = "\ue028"
     DIVIDE = "\ue029"
 
-    F1 = "\ue031"  # function  keys
+    # Function  keys
+    F1 = "\ue031"
     F2 = "\ue032"
     F3 = "\ue033"
     F4 = "\ue034"