Strand v0.7.0

What's Changed

• feat(branch): delete a branch on its remote by @danielss-dev in #9
• feat(search): full-history + content commit search by @danielss-dev in #10
• Repo tab-strip layout, keyboard switching, and quick-switcher by @danielss-dev in #11
• feat(preview): render mermaid diagrams in the markdown preview by @danielss-dev in #12
• fix(repo): open user-owned repos that git2 flags as dubious ownership by @danielss-dev in #13

Full Changelog: v0.6.1...v0.7.0