Use Changesets for changelog and releases (#1)

.changeset/config.json

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+{
+  "$schema": "https://unpkg.com/@changesets/[email protected]/schema.json",
+  "changelog": "./format.js",
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.changeset/format.js

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+/**
+ * @type {import('@changesets/types').GetReleaseLine}
+ */
+const getReleaseLine = async (changeset, type, changelogOpts) => {
+    const [firstLine, ...otherLines] = changeset.summary
+        .trim()
+        .split('\n')
+        .map((l) => l.trimEnd());
+
+    let result = `- ${firstLine}`;
+    if (otherLines.length > 0) {
+        result += `\n${otherLines.map((l) => `  ${l}`).join('\n')}`;
+    }
+
+    return result;
+}
+
+/**
+ * @type {import('@changesets/types').GetDependencyReleaseLine}
+ */
+const getDependencyReleaseLine = async (changesets, dependenciesUpdated, changelogOpts) => {
+    return '';
+}
+
+/**
+ * @type {import('@changesets/types').ChangelogFunctions}
+ */
+const changelogFunctions = {
+    getReleaseLine,
+    getDependencyReleaseLine,
+}
+
+module.exports = changelogFunctions;

.changeset/funny-mails-suffer.md

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+---
+---

.changeset/post-process.js

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+const fs = require('node:fs');
+const path = require('node:path');
+
+for (const workspace of require('../package.json').workspaces) {
+    const changelogPath = path.join(__dirname, '..', workspace, 'CHANGELOG.md');
+    if (!fs.existsSync(changelogPath)) continue;
+    let changelog = fs.readFileSync(changelogPath, 'utf8');
+    changelog = changelog
+        .replace(/^### Major Changes/gm, '### 💥 Breaking Changes')
+        .replace(/^### Minor Changes/gm, '### ✨ Features')
+        .replace(/^### Patch Changes/gm, '### 🐛 Issues');
+    fs.writeFileSync(changelogPath, changelog);
+}

.github/workflows/release.yml

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+name: Release
+on:
+  push:
+    branches:
+      - main
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+      - name: Setup Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci --workspaces
+      - name: Create release PR or publish to npm
+        id: changesets
+        uses: changesets/action@v1
+        with:
+          commit: "Release"
+          title: "Release"
+          version: npm run changeset:version
+          publish: npx changeset publish
+          createGithubReleases: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}