ci: organize and speed up workflows (#215)

* ci: organize and speed up workflows

Reduced `ci.yml` costs and carbon emissions by using only one `job`

---

Part of the https://github.com/Cambridge-ICCS/green-ci initiative 🍃

* remove emojis

* chore: update pnpm name and yaml array syntax

---------

Co-authored-by: Johann Schopplich <mail@johannschopplich.com>

.github/workflows/deploy.yml

@@ -1,37 +1,56 @@
-name: Deploy
+name: Deploy Docs
 
 on:
   push:
     branches:
       - main
+    paths:
+      - docs/**
+      - automd.config.ts
+      - package.json
+      - eslint.config.mjs
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions: {}
+
 jobs:
   deploy:
+    name: Deploy Docs
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - name: Checkout
+        uses: actions/checkout@v5
         with:
-          fetch-depth: 0
-      - uses: pnpm/action-setup@v4
-      - uses: actions/setup-node@v6
+          persist-credentials: false
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
         with:
           node-version: 24
+
       - name: Get pnpm store directory
         id: pnpm-cache
         run: echo "pnpm_cache_dir=$(pnpm store path)" >> $GITHUB_OUTPUT
-      - uses: actions/cache@v4
+
+      - name: Cache pnpm dependencies
+        uses: actions/cache@v4
         with:
           path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
           key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
           restore-keys: |
             ${{ runner.os }}-pnpm-store-
 
-      - run: pnpm install --frozen-lockfile
-      - run: pnpm run docs:build
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build docs
+        run: pnpm run docs:build
 
       - name: Deploy to Cloudflare
         run: cd docs && npx wrangler deploy