feat: add openTabsInCorrectGroup setting to open diff tabs in correct editor groups

[roomote]

Summary

This PR implements the feature requested in #6005 to add an openTabsInCorrectGroup setting that controls where Roo diff tabs are opened in VS Code.

Changes

• Added openTabsInCorrectGroup setting to global-settings.ts (default: false)
• Modified DiffViewProvider to:
  • Accept the setting in its constructor
  • Find existing tabs when the setting is enabled
  • Open diff tabs in the same group as the original file when found
  • Fall back to the active group when the file is not already open
• Updated Task class to pass the setting to DiffViewProvider
• Added comprehensive tests for the new functionality

Behavior

When openTabsInCorrectGroup is enabled:

• For files already open in an editor group: The diff tab opens in the same group as the original file
• For files not currently open: The diff tab opens in the currently active group

When openTabsInCorrectGroup is disabled (default):

• All diff tabs open in the currently active group (preserves existing behavior)

Testing

• Added unit tests to verify the correct viewColumn is used based on the setting
• All existing tests pass
• Linting and type checking pass

Related Issues

Fixes #6005

Acceptance Criteria Met

✅ Setting added with default value of false
✅ When enabled, diff tabs for open files appear beside the original in the same group
✅ When enabled, diff tabs for unopened files appear in the active group
✅ When disabled, all tabs open in the active group
✅ No unrelated tabs or groups are affected

---

Important

Adds openTabsInCorrectGroup setting to control diff tab placement in VS Code, with UI and state management updates.

• Behavior:
  • Adds openTabsInCorrectGroup setting to global-settings.ts (default: false).
  • Modifies DiffViewProvider to open diff tabs in the same group as the original file if openTabsInCorrectGroup is enabled, otherwise in the active group.
  • Updates Task class to pass the setting to DiffViewProvider.
• UI Components:
  • Adds checkbox for openTabsInCorrectGroup in AutoApproveSettings.tsx and SettingsView.tsx.
  • Updates i18n strings in settings.json for new setting.
• State Management:
  • Updates ExtensionStateContext.tsx to include openTabsInCorrectGroup in state and provide setter.
  • Handles openTabsInCorrectGroup in webviewMessageHandler.ts for state updates.
• Testing:
  • Adds unit tests to verify correct behavior based on the setting.
  • Ensures all existing tests pass.

^{This description was created by for 9dd88bb. You can customize this summary. It will automatically update as commits are pushed.}

[ellipsis-dev]

The added 'fileEditingOptions' entries are still in English rather than Russian. Please update these strings with appropriate Russian translations.

^{This comment was generated because it violated a code review rule: irule_C0ez7Rji6ANcGkkX.}

[ellipsis-dev]

The new 'fileEditingOptions' section is still in English. Please provide proper Turkish translations for these texts.

^{This comment was generated because it violated a code review rule: irule_C0ez7Rji6ANcGkkX.}

[ellipsis-dev]

The 'fileEditingOptions' block (including its description and the 'openTabsInCorrectGroup' texts) remains untranslated (in English). Please localize these strings into Vietnamese.

^{This comment was generated because it violated a code review rule: irule_C0ez7Rji6ANcGkkX.}

[ellipsis-dev]

The new 'fileEditingOptions' section and its 'openTabsInCorrectGroup' strings are still in English. Please provide the appropriate Simplified Chinese translations.

^{This comment was generated because it violated a code review rule: irule_C0ez7Rji6ANcGkkX.}

[ellipsis-dev]

The 'fileEditingOptions' block (including description and 'openTabsInCorrectGroup' texts) remains in English. Please update these to proper Traditional Chinese translations.

Suggested change

	"description": "Configure how Roo opens and manages files in the editor",
	"description": "設定 Roo 如何在編輯器中開啟和管理檔案",

^{This comment was generated because it violated a code review rule: irule_C0ez7Rji6ANcGkkX.}

[daniel-lxs]

To be implemented by @felixAnhalt, closing