Automate releases from PR titles and clean up CI workflows.

Add release and PR title checks, shared CI scripts, Gitea PR template, and align pyproject.toml to v0.3.1.

Co-authored-by: Cursor <[email protected]>

scripts/ci/generate-release-notes.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=common.sh
+source "${SCRIPT_DIR}/common.sh"
+
+NEW_TAG="${1:-}"
+SUMMARY="${2:-}"
+PREV_TAG="${3:-}"
+
+if [[ -z "$NEW_TAG" ]]; then
+  echo "Usage: generate-release-notes.sh <new-tag> [summary] [prev-tag]" >&2
+  exit 1
+fi
+
+if [[ -z "$PREV_TAG" ]]; then
+  PREV_TAG=$(git describe --tags --abbrev=0 "${NEW_TAG}^" 2>/dev/null || git describe --tags --abbrev=0 2>/dev/null || true)
+fi
+
+NOTES="## Summary"
+if [[ -n "$SUMMARY" ]]; then
+  NOTES="${NOTES}
+
+$(strip_bump_prefix "$SUMMARY")"
+else
+  NOTES="${NOTES}
+
+Automated release ${NEW_TAG}."
+fi
+
+if [[ -n "$PREV_TAG" ]]; then
+  NOTES="${NOTES}
+
+## Changes since ${PREV_TAG}
+
+$(git log "${PREV_TAG}..HEAD" --pretty=format:'- %h %s' || true)"
+else
+  NOTES="${NOTES}
+
+## Changes
+
+$(git log --pretty=format:'- %h %s' -20 || true)"
+fi
+
+if [[ -n "${GITHUB_OUTPUT:-}" ]]; then
+  {
+    echo 'body<<EOF'
+    echo "$NOTES"
+    echo 'EOF'
+  } >> "$GITHUB_OUTPUT"
+else
+  echo "$NOTES"
+fi