add github linter actions (Ruby / TypeScript)

.github/workflows/ruby-linter.yml

@@ -0,0 +1,23 @@
+name: Ruby
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  linter:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        ruby: [3.1]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+    - run: bundle install
+    - run: ruby -S rake linter:ruby

.github/workflows/typescript-linter.yml

@@ -0,0 +1,16 @@
+name: TypeScript
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  linter:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v3
+    - run: npm i
+    - run: npm run eslint