Set up linter checks

.github/workflows/lint.yaml

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+---
+name: "Lint"
+on:
+  push:
+  workflow_call:
+jobs:
+  eslint:
+    name: "Run eslint"
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "actions/checkout@v4"
+      - uses: "actions/setup-node@v4"
+        with:
+          node-version: "lts/iron"
+          cache: "npm"
+      - name: "Install Dependencies"
+        run: "npm ci"
+      - name: "Run eslint"
+        run: "npm run lint:ts"
+  prettier:
+    name: "Run Prettier"
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "actions/checkout@v4"
+      - uses: "actions/setup-node@v4"
+        with:
+          node-version: "lts/iron"
+          cache: "npm"
+      - name: "Install Dependencies"
+        run: "npm ci"
+      - name: "Run prettier"
+        run: "npm run prettier"
+  markdownlint:
+    name: "Run Markdownlint"
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "actions/checkout@v4"
+      - uses: "actions/setup-node@v4"
+        with:
+          node-version: "lts/iron"
+          cache: "npm"
+      - name: "Install Dependencies"
+        run: "npm ci"
+      - name: "Run markdownlint"
+        run: "npm run mdl"
+  yaml:
+    name: "Lint YAML"
+    runs-on: "ubuntu-latest"
+    container:
+      image: "alpine:latest"
+    steps:
+      - uses: "actions/checkout@v4"
+      - name: "Install yamllint"
+        run: "apk add yamllint"
+      - name: "Run yamllint"
+        run: "yamllint -s ."

.markdownlint.json

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+{
+  "line-length": {
+    "code_blocks": false,
+    "tables": false
+  }
+}

.markdownlintignore

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+/node_modules
+/target
+/sounds
+/LICENSE.md

.yamllint.yaml

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+---
+extends: "default"
+ignore:
+  - "/node_modules"
+  - "/target"
+  - "/sounds"
+rules:
+  truthy:
+    check-keys: false
+  line-length:
+    max: 120
+    allow-non-breakable-words: true
+    allow-non-breakable-inline-mappings: true
+  quoted-strings:
+    quote-type: "double"
+    required: true