add svelte-check to github workflows (#69)

# Problem

Add svelte-check to github workflows and resolve any errors.

Also add prettier checks.

closes #67 

## Steps to Verify:

1. See that svelte-check is running in the github checks below.
2. See that prettier is running in the github checks below.

---------

Co-authored-by: Claire Olmstead <olmsteadclaire@gmail.com>

Author: claireclark1

.github/workflows/prettier.yaml

@@ -0,0 +1,29 @@
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
+name: Prettier checks
+on:
+  push:
+    branches: ['main', '67-add-svelte-check-to-github-workflows---styleguide']
+  pull_request:
+    branches: ['main', '67-add-svelte-check-to-github-workflows---styleguide']
+
+jobs:
+  prettier:
+    name: Prettier
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+
+      - name: Install Dependencies
+        run: npm ci
+
+      - name: Check formatting with Prettier
+        run: npm run prettier:check:ci

.github/workflows/svelte-check.yaml

@@ -0,0 +1,29 @@
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
+name: Svelte Check
+on:
+  push:
+    branches: ['main', 'feat/svelte-app']
+  pull_request:
+    branches: ['main', 'feat/svelte-app']
+
+jobs:
+  prettier:
+    name: Svelte Check
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+
+      - name: Install Dependencies
+        run: npm ci
+
+      - name: Check svelte/ts with svelte-check
+        run: npm run check

package.json

@@ -29,6 +29,7 @@
     "lint:fix": "eslint --fix",
     "format": "npm run prettier && npm run lint:fix",
     "prettier": "prettier --write --plugin prettier-plugin-svelte --plugin prettier-plugin-tailwindcss src",
+    "prettier:check:ci": "npx prettier --check --plugin prettier-plugin-tailwindcss --plugin prettier-plugin-svelte src",
     "check": "svelte-check --tsconfig ./tsconfig.json"
   },
   "devDependencies": {