[Inventory-UI] Build fails due to uninitialized Common-UI submodule is not documented in setup guide

[santhosh-7777]

Environment

• OS: Windows 11
• Node: v18.20.8
• Git: 2.48.1

Problem

After cloning Inventory-UI and running npm start,
build fails with errors across all components:

Cannot find module 'Common-UI/src/registrar/services/session-storage.service'

This affects 40+ components and makes the app
completely unusable.

Root Cause

Inventory-UI uses Common-UI as a git submodule.
The submodule is not initialized after a standard clone.

Fix (Verified)

Run this command after cloning:
git submodule update --init --recursive

After running this, build succeeds successfully.

Suggestion

Add this step to the README and AMRIT setup documentation:
After cloning, run:
git submodule update --init --recursive