Add basic workflow

.github/workflows/build.yaml

@@ -0,0 +1,28 @@
+on: [push]
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
+        lisp:
+          - sbcl-bin
+          - ccl-bin
+          - ecl
+          - abcl-bin
+          - clasp-bin
+          - cmu-bin
+          - clisp-head
+    env:
+      LISP: ${{ matrix.lisp }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: 40ants/setup-lisp@v4
+        with:
+          asdf-system: sijo-doctest
+      # - uses: 40ants/run-tests@v2
+      #   with:
+      #     asdf-system: sijo-doctest