Hookify plugin: python3 command fails on Windows

## Description

The hookify plugin uses python3 in its hook commands, which doesn't exist on Windows. Windows uses python as the executable name.

## Error Message

Plugin hook error: 'python3' is not recognized as an internal or external command, operable program or batch file.

This error appears for all hookify hooks:

• PreToolUse
• PostToolUse
• Stop
• UserPromptSubmit

## Affected File

plugins/hookify/hooks/hooks.json - Lines 9, 20, 31, 42

## Suggested Fix

Change python3 to python in all hook commands. Works on both Windows and Unix.

## Workaround

Manually edit hooks.json files in ~/.claude/plugins/cache/.../hookify/.../hooks/

should use python as it is decprecated and auto points to the correct system defualt for python