Caffold v0.13.0

What's Changed

• Fix the composer image remove button sitting inside its thumbnail by @panarch in #322
• Preview Markdown code blocks in a dialog by @panarch in #323
• Draw indent guides in file trees by @panarch in #324
• Fix phone Sections having no Back and New Task's X covering its composer by @panarch in #325
• Fix file tree guides running into the next item's icon by @panarch in #326
• Fix plan strip errors taking a second line and Retry not recovering them by @panarch in #327

Full Changelog: v0.12.0...v0.13.0