UX Enhancements

• Refine the color scheme for the tree view in oras discover for better visual clarity
• Improve the error message for oras backup when the output file exists as a directory

Detailed Commits

• bump: tag and release ORAS CLI v1.3.0-rc.1 by @Wwwsylvia in #1830
• chore(ux): update colors for oras discover tree view by @Wwwsylvia in #1832
• chore(ux): improve oras backup error message by @Wwwsylvia in #1833

Full Changelog: v1.3.0-rc.1...v1.3.0-rc.2

Notes

This release was signed with 3E94 D52A FA46 5877 CAEA 79F1 E805 2EA1 7ECB 9A6C (@Wwwsylvia's GPG key) which can be found here.