Add changesets based publishing (#199)

* Add changesets based publishing

* Harden release workflow

* Remove dependency cache from release workflow

Author: JoviDeCroock

.changeset/README.md

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+# Changesets
+
+This folder is used by `@changesets/cli` to track release notes and version bumps.
+
+Quick links:
+
+- [Adding a changeset](https://github.com/changesets/changesets/blob/main/docs/adding-a-changeset.md)
+- [Versioning packages](https://github.com/changesets/changesets/blob/main/docs/versioning-packages.md)
+- [Publishing packages](https://github.com/changesets/changesets/blob/main/docs/publishing.md)

.changeset/config.json

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+{
+	"$schema": "https://unpkg.com/@changesets/config@2.1.1/schema.json",
+	"commit": false,
+	"fixed": [],
+	"linked": [],
+	"access": "public",
+	"baseBranch": "main",
+	"updateInternalDependencies": "patch",
+	"ignore": []
+}

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+
+jobs:
+  release:
+    name: Release
+    outputs:
+      has_changesets: ${{ steps.changesets.outputs.hasChangesets }}
+      should_publish: ${{ steps.publish-check.outputs.should_publish }}
+    permissions:
+      contents: write
+      issues: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: package.json
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Update npm
+        run: npm install -g npm@11.11.1
+
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+
+      - name: Create Release Pull Request
+        id: changesets
+        uses: changesets/action@e0145edc7d9d8679003495b11f87bd8ef63c0cba # v1.5.3
+        with:
+          version: npm run version
+          commitMode: github-api
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Check whether this version still needs publishing
+        if: steps.changesets.outputs.hasChangesets == 'false'
+        id: publish-check
+        shell: bash
+        run: |
+          PACKAGE_NAME=$(node -p "require('./package.json').name")
+          PACKAGE_VERSION=$(node -p "require('./package.json').version")
+
+          echo "Checking whether ${PACKAGE_NAME}@${PACKAGE_VERSION} is already on npm"
+          if npm view "${PACKAGE_NAME}@${PACKAGE_VERSION}" version >/dev/null 2>&1; then
+            echo "should_publish=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          echo "should_publish=true" >> "$GITHUB_OUTPUT"
+
+  publish:
+    name: Publish
+    needs: release
+    if: needs.release.outputs.should_publish == 'true'
+    environment:
+      name: npm
+      url: https://www.npmjs.com/package/@preact/preset-vite
+    permissions:
+      contents: write
+      id-token: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Update npm
+        run: npm install -g npm@11.11.1
+
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+
+      - name: Build package
+        run: npm run build
+
+      - name: Publish packages
+        uses: changesets/action@e0145edc7d9d8679003495b11f87bd8ef63c0cba # v1.5.3
+        with:
+          publish: npm exec -- changeset publish
+          commitMode: github-api
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}