ci: add auto changelog and version update workflows

Author: Copilot

.github/config/labels.json

@@ -0,0 +1,12 @@
+[
+	{
+		"name": "skip-changelog",
+		"color": "ededed",
+		"description": "Exclude this PR from the automated changelog update."
+	},
+	{
+		"name": "auto version bump",
+		"color": "bfd4f2",
+		"description": "Automated version bump PRs created by the release workflow."
+	}
+]

.github/scripts/check-changelog-exclusions.mjs

@@ -0,0 +1,135 @@
+/**
+ * Checks if a PR should be excluded from the changelog
+ * Used by the changelog-ci workflow to determine early if processing should continue
+ */
+
+import { INCLUDED_TYPES } from "./update-changelog.mjs";
+
+/**
+ * Labels that should exclude PRs from the changelog
+ */
+const EXCLUDED_LABELS = [
+	"skip-changelog",
+	"no-changelog",
+	"dependencies",
+	"dependabot",
+	"auto version bump",
+	"release",
+];
+
+/**
+ * Commit types that should exclude PRs from the changelog
+ */
+const EXCLUDED_TYPES = [
+	"build",
+	"chore",
+	"ci",
+	"docs",
+	"image",
+	"style",
+	"test",
+];
+
+/**
+ * All valid commit types (included + excluded)
+ * Included types are derived from TYPE_TO_SECTION
+ */
+const ALL_COMMIT_TYPES = [...INCLUDED_TYPES, ...EXCLUDED_TYPES];
+
+/**
+ * Regex to match conventional commit type prefix in PR titles,
+ * including both included and excluded types.
+ */
+const typeRegex = new RegExp(
+	`^(${ALL_COMMIT_TYPES.join("|")})(\\(.+?\\))?!?:`,
+	"i",
+);
+
+/**
+ * Checks if the PR has any labels that are in the EXCLUDED_LABELS list.
+ * The PR should be excluded from the changelog update process if any excluded label is found.
+ *
+ * @param {string[]} labels - Array of PR labels
+ * @returns {boolean} - True if any label is excluded
+ */
+function hasExcludedLabel(labels) {
+	return labels.some((label) =>
+		EXCLUDED_LABELS.includes(label.name.toLowerCase()),
+	);
+}
+
+/**
+ * Gets the name of the excluded label, if any.
+ * @param {string[]} labels - Array of PR labels
+ * @returns {string|undefined} - The name of the excluded label, if any
+ */
+function getExcludedLabel(labels) {
+	return labels.find((label) =>
+		EXCLUDED_LABELS.includes(label.name.toLowerCase()),
+	)?.name;
+}
+
+/**
+ * Checks if a PR should be excluded from the changelog
+ */
+export default async function checkExclusions({ pr, core }) {
+	try {
+		const prTitle = pr.title;
+
+		console.log(`🔍 Checking exclusions for PR #${pr.number}: ${prTitle}`);
+
+		let shouldSkip = false;
+		let skipReason = "";
+
+		// Check for excluded labels
+		if (hasExcludedLabel(pr.labels)) {
+			const excludedLabel = getExcludedLabel(pr.labels);
+			console.log(`⏭️  PR has excluded label "${excludedLabel}". Should skip.`);
+			shouldSkip = true;
+			skipReason = `excluded label: ${excludedLabel}`;
+		}
+		// Check for conventional commit type
+		else {
+			// Match the PR title against the regex to extract the commit type.
+			const match = prTitle.match(typeRegex);
+
+			// If no conventional commit type is found, skip the PR.
+			if (!match) {
+				console.log(
+					"⚠️  No conventional commit type found in PR title. Should skip.",
+				);
+				shouldSkip = true;
+				skipReason = "no conventional commit type";
+			}
+			// If a commit type is found, check if it's in the excluded types list.
+			else {
+				// Extract the commit type from the matched regex and
+				// convert it to lowercase for comparison.
+				const type = match[1].toLowerCase();
+
+				// If the commit type is in the EXCLUDED_TYPES list, skip the PR.
+				if (EXCLUDED_TYPES.includes(type)) {
+					console.log(
+						`⚠️  Conventional commit type "${type}" is excluded. Should skip.`,
+					);
+					shouldSkip = true;
+					skipReason = `excluded type: ${type}`;
+				}
+				// If the commit type is NOT in the EXCLUDED_TYPES list, include the PR.
+				else {
+					console.log(`✅ PR will be included in changelog (type: ${type})`);
+				}
+			}
+		}
+
+		// Set outputs
+		core.setOutput("should-skip", shouldSkip.toString());
+		// If skipping, provide the reason.
+		if (shouldSkip) {
+			core.setOutput("skip-reason", skipReason);
+		}
+	} catch (error) {
+		console.error("❌ Error checking exclusions:", error);
+		core.setFailed(`Failed to check exclusions: ${error.message}`);
+	}
+}