Add confirmation dialog before creating a new project on Planet

[anshukaushik4700]

Description

This PR adds a confirmation dialog before resetting the current project when the "New Project" option is selected on Planet.
Previously, clicking "New Project" would immediately clear the workspace without any warning. This could result in accidental data loss if the user had unsaved work.

Previous Behavior

• Clicking "New Project" instantly resets the workspace.
• No confirmation or warning is shown.
• Unsaved user work can be lost unintentionally.

Current Behavior

• When the user clicks "New Project", a confirmation dialog should appear.
• The workspace should only reset if the user confirms the action.
• If the user cancels, the current project should remain unchanged.

Video

Music.Blocks.-.Google.Chrome.2026-02-26.03-39-36.mp4

Changes Made

• Added a confirmation prompt before triggering workspace reset.
• Ensured the reset action only executes upon user confirmation.
• Preserved existing behavior if confirmation is accepted.

Why This Change Is Important

This improves user experience and prevents accidental data loss, especially for younger users who may click options unintentionally.

Fixes #5908

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[7se7en72025]

LGTM @walterbender .
Confirmed locally that the new confirmation dialog correctly intercepts the reset action, providing a clear warning that prevents accidental data loss in the Planet view.

[anshukaushik4700]

Hello @walterbender @omsuneri @vanshika2720, I’d appreciate it if you could review this PR at your convenience. Thank you!