chore: onboard to semver

.github/workflows/ci.yml

@@ -0,0 +1,55 @@
+name: CI
+on:
+  push:
+      branches:
+        - "main"
+  pull_request:
+
+jobs:
+  stylua:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Run Stylua check
+        uses: JohnnyMorganz/stylua-action@v2
+        with:
+          # token is needed because the action allegedly downloads binary from github releases
+          token: ${{ secrets.GITHUB_TOKEN }}
+          # CLI arguments
+          args: --check .
+          version: latest
+  generateTOC:
+    name: TOC Generator
+    runs-on: ubuntu-latest
+    steps:
+      - uses: technote-space/toc-generator@v4
+        with:
+          CHECK_ONLY_DEFAULT_BRANCH: true
+  release:
+    name: release
+
+    if: ${{ github.ref == 'refs/heads/main' }}
+    needs:
+      - stylua
+      - generateTOC
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: google-github-actions/release-please-action@v3
+        id: release
+        with:
+          release-type: simple
+          package-name: mason-null-ls.nvim
+      - uses: actions/checkout@v3
+      - name: tag stable versions
+        if: ${{ steps.release.outputs.release_created }}
+        run: |
+          git config user.name github-actions[bot]
+          git config user.email github-actions[bot]@users.noreply.github.com
+          git remote add gh-token "https://${{ secrets.GITHUB_TOKEN }}@github.com/google-github-actions/release-please-action.git"
+          git tag -d stable || true
+          git push origin :stable || true
+          git tag -a stable -m "Last Stable Release"
+          git push origin stable
+
+