backstage release v0.155.0

Added

• (agent-platform) Agent creation flow with direct-apply deploy in #1897 by @marians

Changed

• (deps) Update dependency mermaid to v11.16.0 (#1918) [skip ci] in #1918 by @renovate[bot]
• (deps) Update dependency knex to v3.3.0 (#1917) [skip ci] in #1917 by @renovate[bot]

Full Changelog: https://github.com/giantswarm/backstage/compare/v0.154.12...v0.155.0