make: add github actions workflow for tests

Author: berk-karaal

.github/workflows/tests.yaml

@@ -0,0 +1,43 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+    types:
+      - opened
+      - synchronize
+      - reopened
+  workflow_dispatch:
+
+jobs:
+  run_tests:
+    name: Run tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Install Fish
+        run: |
+          sudo apt-add-repository -yn ppa:fish-shell/release-3
+          sudo apt-get update
+          sudo apt-get install -y fish
+
+      - name: Install Fisher
+        run: |
+          curl -sL https://raw.githubusercontent.com/jorgebucaran/fisher/main/functions/fisher.fish | source && fisher install jorgebucaran/fisher
+        shell: fish {0}
+
+      - name: Install Tools
+        run: fisher install jorgebucaran/fishtape
+        shell: fish {0}
+
+      - name: Run tests
+        run: fishtape tests/*.fish
+        shell: fish {0}