Add github ci for linux/windows runners

.github/workflows/test.yml

@@ -0,0 +1,42 @@
+name: "Emacs test CI"
+on:
+  push:
+    paths-ignore:
+    - '**.md'
+    - '**.org'
+jobs:
+  # Linux ci adapted from https://github.com/purcell/emacs.d
+  startup_linux:
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental }}
+    strategy:
+      matrix:
+        emacs_version:
+          - 29.3
+        experimental: [false]
+        # include:
+        #   - emacs_version: snapshot
+        #     experimental: true
+    steps:
+    - uses: purcell/setup-emacs@master
+      with:
+        version: ${{ matrix.emacs_version }}
+    - uses: actions/checkout@v4
+    - name: Test directory
+      run: pwd
+    - name: Check startup
+      run: ./test/test_startup.sh
+  # windows CI is experimental and uses the Emacs version packaged 
+  # by chocolately: https://community.chocolatey.org/packages/Emacs
+  startup_windows:
+    runs-on: windows-latest
+    steps:
+    - name: Disable choco progress
+      run: choco feature disable -n=showDownloadProgress
+    - name: Install emacs
+      run: choco install emacs
+    - name: Check emacs version
+      run: emacs --version
+    - uses: actions/checkout@v4
+    - name: Check startup
+      run: bash ./test/test_startup.sh

.gitignore

@@ -26,3 +26,7 @@ custom.el
 # keep some necessary files
 README.org
 LICENSE
+
+# github ci
+!.github
+!.github/**/*