feat(workflow): simplify workflow

.gitea/workflows/workflow.yml

@@ -0,0 +1,52 @@
+name: Workflow
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '25'
+          # We handle caching manually below to ensure
+          # corepack-managed yarn is used correctly.
+
+      - name: Enable Corepack
+        run: |
+          corepack enable
+          corepack prepare yarn@stable --activate
+
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
+
+      - name: Persistent Yarn Cache
+        uses: actions/cache@v4
+        id: yarn-cache
+        with:
+          path: ${{ github.workspace }}/.yarn/cache
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
+      - name: Install dependencies
+        # --immutable ensures the lockfile isn't changed (replaces --frozen-lockfile)
+        run: yarn install --immutable
+
+      - name: Build Svelte App
+        run: yarn build
+
+      - name: Lint
+        run: yarn lint
+
+      - name: Type Check
+        run: yarn check:shadcn-excluded