Enhance README with project details and setup instructions

modified

product elimintad

products modifieds

third flower added

second flower added

description and price added

first real product added

made the nav bar fixed

made the index responsive too

maded responsive for iPhone

forgot to save some files

styles moved from style to catalog to have everything in one css file

Cart function added, some styles added to catalog, working on implement everything as a component and render it on the index.html like a React project

Cart implemented on HTML and CSS, working on Java