Refactor to use localized state management for conversation ID

[Asin-Junior-Honore]

Description

This PR fixes the usage of a global variable GlobalConversationID in Copilot.tsx. The global variable has been refactored to use localized state management with React's useState hook. issue #115

Changes include:

• Refactored createNewConversation function to accept a state setter for conversation ID.
• Updated CopilotChat component to manage the conversation ID using the useState hook.
• Adjusted relevant function calls and state management logic to accommodate these changes.

[Asin-Junior-Honore]

hey @Arindam200 , @mason-at-pieces , @shivay-at-pieces please could someone review my PR please , thank you

[Asin-Junior-Honore]

Hey @Arindam200 ,

Please review the changes I made based on your request a few hours ago. Thanks!