feat(scripts): add script to clean old PyPI dev versions

- Introduces a Bash script to delete outdated PyPI dev versions
  from the Gitea package registry while keeping the latest version
- Uses environment variables for authentication and repository details

.gitea/scripts/cleanup_dev_versions.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# cleanup_dev_versions.sh - Delete old PyPI dev versions from Gitea package registry
+
+# Required environment variables
+USERNAME="${TWINE_USERNAME}"
+TOKEN="${TWINE_PASSWORD}"
+REPO="${GITHUB_REPOSITORY}"             # e.g., maxp/repocat
+API_BASE="${GITHUB_API_URL%/}"         # Strip trailing slash if present
+
+OWNER="${REPO%%/*}"
+PACKAGE_NAME="${REPO##*/}"
+API_URL="${API_BASE}/packages/${OWNER}/pypi/${PACKAGE_NAME}"
+
+# Fetch the list of versions
+response=$(curl -s -u "$USERNAME:$TOKEN" "$API_URL")
+
+# Extract all .dev versions, sort by creation time
+mapfile -t versions_to_delete < <(echo "$response" | jq -r '
+  map(select(.version | test("\\.dev"))) |
+  sort_by(.created_at) |
+  .[0:-1][] |
+  .version')
+
+# Determine latest version to keep
+latest_version=$(echo "$response" | jq -r '
+  map(select(.version | test("\\.dev"))) |
+  sort_by(.created_at) |
+  last.version')
+
+if [[ -z "$latest_version" || ${#versions_to_delete[@]} -eq 0 ]]; then
+  echo "No old .dev versions to delete."
+  exit 0
+fi
+
+echo "Keeping latest .dev version: $latest_version"
+
+# Delete old .dev versions
+for version in "${versions_to_delete[@]}"; do
+  echo "Deleting old .dev version: $version"
+  curl -s -X DELETE -u "$USERNAME:$TOKEN" "$API_URL/$version"
+done
+
+echo "Cleanup complete."