docs: fix package manager commands from npm run to yarn

[hamed-zeidabadi]

Description

This PR fixes incorrect package manager command references in the README documentation.

Changes

• Replace npm run with yarn in prerequisites section
• Fix installation command from npm run install to yarn install
• Update all command examples in the scripts table
• Correct FAQ section references

Motivation

The README incorrectly referenced npm run (which is not a valid package manager) instead of yarn. This was causing confusion for users trying to follow the installation and usage instructions.

Type of Change

• [x] Documentation update
• [ ] Bug fix
• [ ] New feature
• [ ] Breaking change