feat: one commit for release update

[shavonn]

No description provided.

[Copilot]

Pull request overview

This PR updates the release PR creation script to produce a single consolidated commit for release-related changes, instead of committing the version bump and changelog update separately.

Changes:

• Remove the separate git commit calls from the version bump and changelog sections.
• Add a single “commit all staged release changes” step with a unified commit message.

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[Copilot]

The conditional that decides whether to git add package-lock.json is checking the staged diff (git diff --staged --quiet package-lock.json). At this point the lockfile hasn’t been staged yet, so this will typically report “no staged changes” and skip adding the lockfile even when npm version modified it. Use a working-tree/index check (e.g., git diff --quiet -- package-lock.json or git status --porcelain -- package-lock.json) so changed lockfiles are reliably included in the release commit.

Suggested change

	if [[ -f package-lock.json ]] && ! git diff --staged --quiet package-lock.json 2>/dev/null; then
	if [[ -f package-lock.json ]] && ! git diff --quiet -- package-lock.json 2>/dev/null; then