yaggui 0.8.0

What's Changed

• feat(website): list the docs pages in the empty search dialog by @SimonVanMello in #67
• ci(website): post the preview URLs on the pull request by @SimonVanMello in #68
• docs(plan): add milestone M8 (hardening) by @SimonVanMello in #69
• fix: M8-1 backend fixes (stash file conflict outcome, bisect skip result) by @SimonVanMello in #70
• M8-2: product gaps (palette bisect / line history, squash! & amend! autosquash, backups cleanup, first-parent bisect) by @SimonVanMello in #72
• test(ipc): M8-3 mock / backend parity (line history, stash base, bisect reload, journal) by @SimonVanMello in #71
• docs: mark M8 done and add its changelog entries by @SimonVanMello in #73
• feat(history): fast-forward whichever dropped branch is behind by @SimonVanMello in #74
• chore(release): 0.8.0, with syntax colors in the file viewer by @SimonVanMello in #75

Full Changelog: v0.7.0...v0.8.0