CLI-60: Suppress release link auto-open when --yes-always is set

[szmania]

This PR addresses the issue where the release notes link automatically opens in the browser when the --yes-always flag is set.

Problem

When users run cecli with --yes-always, cecli still auto-opens the release link in the browser on startup due to auto-answering the first-run prompt. This causes unexpected browser tabs to open in headless/automated contexts.

Solution

Modified cecli/main.py: Updated the main_async function to skip the automated browser opening logic if args.yes_always is True. This ensures that automated testing environments or non-interactive sessions are not interrupted by unexpected browser launches.

Specifically changed:

• Line ~1700: elif args.show_release_notes is None and is_first_run:
  to elif args.show_release_notes is None and is_first_run and not args.yes_always:

Verification

• Verified that running cecli --yes-always no longer triggers the browser.
• Verified that the standard behavior (without --yes-always) still opens the link as expected.
• Verified that explicit --show-release-notes still opens the link.

This respects the non-interactive intent of the --yes-always flag by skipping the release notes offer_url prompt when the user has specified "always yes".