fix: consistent spacing of check icons in sync output

[javoire]

Summary

• Add WrapWithSuccessIndented to spinner package for indented operations
• Sub-operations (rebase, push) now show checkmarks at column 2 with consistent single-space after ✓

Before:

✓ Fetched from origin and loaded PRs
✓   Rebased onto origin/master          # 3 chars between ✓ and text
✓   Pushed to origin                    # 3 chars between ✓ and text
  ✓ PR #774 base is already correct     # ✓ at column 2

After:

✓ Fetched from origin and loaded PRs
  ✓ Rebased onto origin/master          # ✓ at column 2
  ✓ Pushed to origin                    # ✓ at column 2
  ✓ PR #774 base is already correct     # ✓ at column 2

🤖 Generated with Claude Code

[javoire]

🎉 This PR is included in version 1.8.1 🎉

The release is available on GitHub release

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