fix: prepare release automation

Author: rexxars

Diff for: .github/workflows/ci.yml

@@ -1,9 +1,23 @@
 name: CI
 
+# Workflow name based on selected inputs. Fallback to default Github naming when expression evaluates to empty string
+run-name: >-
+  ${{
+    inputs.release && 'CI ➤ Publish to NPM' ||
+    ''
+  }}
+
 on:
   pull_request:
   push:
     branches: [main]
+  workflow_dispatch:
+    inputs:
+      release:
+        description: 'Publish new release'
+        required: true
+        default: false
+        type: boolean
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
@@ -20,3 +34,28 @@ jobs:
           cache: npm
       - run: npm ci
       - run: npm test
+
+  release:
+    needs: [test]
+    # only run if opt-in during workflow_dispatch
+    if: always() && github.event.inputs.release == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          # Need to fetch entire commit history to
+          # analyze every commit since last release
+          fetch-depth: 0
+      - uses: actions/setup-node@v3
+        with:
+          node-version: lts/*
+          cache: npm
+      - run: npm ci
+        # Branches that will release new versions are defined in .releaserc.json
+      - run: npx semantic-release
+        # Don't allow interrupting the release step if the job is cancelled, as it can lead to an inconsistent state
+        # e.g. git tags were pushed but it exited before `npm publish`
+        if: always()
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_PUBLISH_TOKEN }}

Diff for: .releaserc.json

@@ -0,0 +1,4 @@
+{
+  "extends": "@sanity/semantic-release-preset",
+  "branches": ["main"]
+}