build: add prep-release recipie to justfile

justfile

@@ -6,3 +6,17 @@ test path repo:
   GITHUB_REPOSITORY=kemitix/{{ repo }} \
   GITHUB_SERVER_URL=https://git.kemitix.net \
   cargo run
+
+next_version := `git-cliff --bumped-version | cut -b 2-`
+
+@next:
+  echo "Next version: {{ next_version }}"
+
+prep-release:
+  jj new -m"chore: release {{ next_version }}"
+  cargo set-version "{{ next_version }}"
+  git-cliff -o CHANGELOG.md --bump
+  echo "Check CHANGELOG.md for next version"
+  jj diff
+  jj status
+