feat: Add Tooltip for necessary icons

[NirajC-Microsoft]

Purpose

This pull request introduces several UI improvements focused on accessibility and user experience, primarily by adding tooltips to key interactive elements and refining button labeling. The changes make it clearer to users what actions buttons perform, especially for navigation and dialog controls.

Accessibility and UI improvements:

• Added a tooltip labeled "Close" to the dialog close button in DialogTitleBar, improving accessibility for screen readers and clarity for users.
• Added tooltips labeled "Previous" and "Next" to the pagination navigation buttons, making their purpose explicit to users.

Component enhancements:

• Updated the send button in the chat room to explicitly display the title "Send", ensuring consistent labeling and clarity.

Dependency updates:

• Imported the Tooltip component from @fluentui/react-components in both dialogTitleBar.tsx and pagination.tsx to support the new tooltips. [1] [2]

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

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Other Information