Code Quality: Enhance cancellation handling in methods

[IHaidov]

Resolved / Related Issues

Closes #15095

Steps used to test these changes

• Reviewed all methods to ensure CancellationToken was correctly propagated and utilized where supported.
• Verified the following scenarios for proper handling of cancellations:
  • Initializing tags using InitAsync.
  • Canceling operations during file tag loading.
  • Canceling long-running operations triggered by commands (e.g., ViewMore, OpenAll).
• Confirmed that cancellation improved responsiveness without breaking functionality.
• Tested all affected scenarios for stability, including:
  • Loading file tags and icons.
  • Navigating using the updated commands.
  • Performing various file operations during cancellation scenarios.

[yaira2]

@IHaidov thank you for your contribution. We're still reviewing the proposal in #15095 and haven't approved it just yet. We'll look into this shortly and will let you know if we plan to move forward with the proposed changes. For the future, you can view the approval status on the right pane of the issue.