add continue button for live stream analysis

add disconnect button and solve live frame glitching issue

allow analyse either one cam only

implemented Live Cam feature

enhanced code clarity, consistency, maintainability

solved the frame glitch bug, enable user to continue session and top up kpi total

commented dispaly:block;

fixed counts overwritten to 0 bug

able to process two video simultaneously and reflect the dashboard correctly

aggregate entry and exit data to kpi card and bar chart

can configure for both cam but can't run inference at the same time

new ui/ux

complete phase 1