Make this module releaseable internally to the Spendesk organisation

- Move from yarn to npm
- Rename package to `@spendesk/prettier-plugin-import-sort`
- Add Github workflows
- Bump version

.github/workflows/release.yml

@@ -0,0 +1,23 @@
+name: Release
+on:
+  push:
+    tags:
+      - v*
+jobs:
+  release:
+    permissions:
+      contents: write
+      pull-requests: write
+      id-token: write
+      packages: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Release action
+        uses: Spendesk/common-github-actions/spendesk-release@main
+        with:
+          skip-checks: false
+          dual-publish: false
+          use-semantic-release: false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/test.yml

@@ -0,0 +1,19 @@
+name: Build and test
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - id: setup-node
+        uses: actions/setup-node@v3
+        with:
+          node-version-file: package.json
+      - run: npm ci
+      - run: npm test

.npmrc

@@ -0,0 +1,2 @@
+//npm.pkg.github.com/:_authToken=${GH_TOKEN}
+@spendesk:registry=https://npm.pkg.github.com