Move files into Copilot CLI specific folders

[DonJayamanne]

Co-authored-by: Copilot copilot@github.com

[Copilot]

Pull request overview

This PR updates the Copilot extension’s Copilot CLI chat-session implementation to reflect a “Copilot CLI specific folders” layout by fixing relative import paths after the re-organization.

Changes:

• Updated relative imports in Copilot CLI vscode-node sources to reference platform/, util/, and shared chatSessions/common modules correctly.
• Updated Vitest specs’ imports and vi.mock(...) module paths to match the new folder structure.

Show a summary per file

File	Description
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/copilotCLISDKUpgrade.spec.ts	Adjusts test imports to correct platform and Copilot CLI node shim paths.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/copilotCLICustomizationProvider.spec.ts	Fixes test imports to point at moved platform, util, and Copilot CLI node modules.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/chatSessionMetadataStoreImpl.spec.ts	Updates test imports and vi.mock target path for cliHelpers after folder changes.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/chatSessionInitializer.spec.ts	Updates initializer test imports to correct platform, util, and shared chatSessions paths.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/askUserQuestionHandler.spec.ts	Fixes tool/test imports and typed mock import path for ILogService.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/copilotCLIPromptReferences.ts	Updates util/* and vscodeTypes imports to match the new relative depth.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/copilotCLICustomizationProvider.ts	Fixes platform/*, util/*, and Copilot CLI node imports for the new folder layout.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/copilotCLIChatSessionInitializer.ts	Adjusts imports for platform/*, util/*, shared chatSessions/common, and Copilot CLI node modules.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/chatSessionMetadataStoreImpl.ts	Updates imports for platform/*, util/*, shared chatSessions/common, and Copilot CLI node helpers.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/askUserQuestionHandler.ts	Fixes imports for platform/*, util/*, tools, and Copilot CLI node user input helpers.

Copilot's findings

• Files reviewed: 10/10 changed files
• Comments generated: 0