ci: clean up and simplify GitHub Actions (#228)

* ci: simplify skipping jobs on releases

* ci: remove unused nx actions

* ci: remove duplicated test job

This was copied from `netlify/build`, where confusingly it had a job named `test` that
tests all packages except the one named `build`, and `test-build` which tests only the one
named `build`.

This ended up copied over as two jobs that test all packages in this monorepo.

* ci: remove unused go setup

* ci: extract publint workflow and rename from "lint" to "publint"

* ci: rename "Build" job to "Test"

Author: serhalp

.github/workflows/build.yaml

@@ -0,0 +1,28 @@
+name: Publint
+on:
+  push:
+    branches: [main]
+  pull_request:
+    types: [opened, synchronize, reopened]
+  merge_group:
+jobs:
+  publint:
+    if: "${{ !startsWith(github.head_ref, 'release-') }}"
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - run: git config --global core.symlinks true
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci
+      - name: Build
+        run: npm run build --workspaces=true
+      - name: Publint
+        run: npm run publint --workspaces=true --if-present

.github/workflows/publint.yaml

@@ -0,0 +1,50 @@
+name: Test
+on:
+  # Ensure GitHub actions are not run twice for same commits
+  push:
+    branches: [main]
+  pull_request:
+    types: [opened, synchronize, reopened]
+  merge_group:
+jobs:
+  test:
+    if: "${{ !startsWith(github.head_ref, 'release-') }}"
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+        node-version: ['*']
+        deno-version: ['v1.37.0', 'v1.44.4']
+        include:
+          - os: ubuntu-latest
+            node-version: '18.14.0'
+            deno-version: 'v1.44.4'
+      fail-fast: false
+    steps:
+      # Increasing the maximum number of open files. See:
+      # https://github.com/actions/virtual-environments/issues/268
+      - name: Increase open file limit
+        run: sudo ulimit -Sn 65536
+        if: "${{ matrix.os == 'macOS-latest' }}"
+      - run: git config --global core.symlinks true
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+      - name: Setup Deno
+        uses: denoland/setup-deno@v1
+        with:
+          deno-version: ${{ matrix.deno-version }}
+      - name: Setup Deno dependencies
+        run: deno cache https://deno.land/x/eszip@v0.55.2/eszip.ts
+      - name: Install dependencies
+        run: npm ci
+      - name: Build
+        run: npm run build --workspaces=true
+      - name: Tests
+        run: npm run test --workspaces=true