Implemented deploy as single service changes

[SiriChandanaGarimella]

Fixes #100

What was changed?

• Implemented single service deployment by serving the React frontend through the Flask backend server.
• Updated Orca dashboard routing from legacy to a new component (renamed OrcaDashboardComponent to OrcaDashboardComponentLegacy and DraftOrcaDashboard as OrcaDashboardComponent and set new component as a default route)

Why was it changed?

• To simplify application deployment and maintenance
• To eliminate the need for running separate frontend and backend servers on Raspberry Pi deployment
• To standardize the Orca dashboard implementation by using the new component structure

How was it changed?

• Added deploy_as_single_service.sh script: It builds the React application, copies the build files to flask's static directory and starts the flask server
• Added run_prod_server.sh script for the production env
• Updated all the relevant files in client-app and server folders
• Updated README.md file with the steps to run it as single service
• Renamed the original OrcaDashboard component to OrcaDashboardComponentLegacy for reference
• Renamed DraftOrcaDashboard component as OrcaDashboardComponent, which has the new UI changes
• Set the new OrcaDashboardComponent as the default route in App.js