add gitea pr checks workflow

.gitea/workflows/pr-checks.yml

@@ -0,0 +1,42 @@
+name: PR Checks
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - codex/**
+
+concurrency:
+  group: pr-checks-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  typecheck-and-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "1.3.5"
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Typecheck
+        run: bun run lint
+
+      - name: Build
+        env:
+          DATABASE_URL: file:data/fiscal.sqlite
+          NEXT_PUBLIC_API_URL: ""
+          BETTER_AUTH_SECRET: ci-secret
+          BETTER_AUTH_BASE_URL: http://localhost:3000
+          BETTER_AUTH_TRUSTED_ORIGINS: http://localhost:3000
+          WORKFLOW_TARGET_WORLD: local
+        run: bun run build