chore: prepare for tagged releases

Taskfile

@@ -44,4 +44,16 @@ dev() {
   find src static migrations | entr -ccdr ./Taskfile _cargo run -- serve
 }
 
+release() {
+  set -euo pipefail
+  bash e2e/Taskfile playwright:ci
+  _cargo test
+  new_tag=$(git-cliff --bumped-version)
+  git tag -m "$new_tag" "$new_tag"
+  cargo set-version "${new_tag#v}"
+  mv CHANGELOG.md CHANGELOG.old
+  cat <(git cliff) <(printf "\n") CHANGELOG.old > CHANGELOG.md
+  rm CHANGELOG.old
+}
+
 "$@"