[BUG]: Education AI Suite: Missing commands, node installation, and incorrect Python version in documentation

Bug Description

1. python version we should change requirement to 3.12 instead of 3.12+
2. $ cd smart-classroom #this is missing before installing requirements
3. node installation step is missing
4. pip install hf_xet #without this model download didn't proceed further

System Setup

Windows 11

Reproducible Steps

NA

Root Cause Analysis

No response