Update README.md with proper heading structure

Update README.md with IoT section header

Fix typo in README header

Add README file for IoT Network Device Monitoring

Test image added

Add input data for IoT devices

Delete Analyse Sales/temp

Delete Analyse Sales/demooo

Create demooo

Create temp

Delete Analyse Sales/temp

Create Analyse Sales Project

Delete Employee Trends

Create Employee Trends

Fix formatting issue in README.md