fix: concurrent cy.prompt() and Studio bundle download issues

[ryanthemanuel]

Additional details

The existing error when the cy.prompt bundle is prematurely deleted off disk is less than helpful. It's also possible that we are deleting the bundle while other Cypress instances are accessing it. This PR:

• Updates the error message to provide more guidance about what to do if the cy.prompt bundle is no longer properly available
• Ensures that writes for the bundles are done atomically so there is no chance of code being stomped on.

Steps to test

How has the user experience changed?

PR Tasks

• Have tests been added/updated?
• Has a PR for user-facing changes been opened in cypress-documentation?
• Have API changes been updated in the type definitions?

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Note

Atomically downloads/extracts Cloud bundles (Studio and cy.prompt) to prevent concurrent write issues and adds safer cy.prompt init with a new refresh error; includes tests and dependency update.

• Backend (Cloud bundles):
  • Added extractAtomic to write tar entries atomically via write-file-atomic.
  • Updated ensureCyPromptBundle and ensureStudioBundle to:
    • Download to a unique bundle.tar-<random> path, extract via extractAtomic, then remove temp file.
    • Stop deleting the target directory pre-extract.
  • Added dependency [email protected].
• Driver (cy.prompt):
  • Wrap module federation init/load in try/catch; on failure throw prompt.promptBundleNeedsRefresh.
  • Introduced new error message promptBundleNeedsRefresh in error_messages.
• Tests:
  • New unit and integration tests for extractAtomic and updated bundle ensure flows (cy-prompt and studio).
• Docs/Changelog:
  • CHANGELOG bugfix entry describing atomic bundle writes and updated cy.prompt() error.

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[cypress]

cypress    Run #67660

Run Properties:   Passed #67660  •  c08155f4eb: Update cli/CHANGELOG.md

Project	cypress
Branch Review	ryanm/chore/slight-refactor-for-ensuring-bundles
Run status	Passed #67660
Run duration	19m 04s
Commit	c08155f4eb: Update cli/CHANGELOG.md
Committer	Ryan Manuel
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	14
Pending	1097
Skipped	4
Passing	26698
View all changes introduced in this branch ↗︎

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Warning

Partial Report: The results for the Application Quality reports may be incomplete.

UI Coverage  45.89%
Untested elements	186
Tested elements	162

Accessibility  98%
Failed rules	4 critical   8 serious   2 moderate   2 minor
Failed elements	101