feat: add initial project configuration and smoke tests

- Created pnpm workspace configuration to manage packages.
- Added a placeholder .gitkeep file in the scripts directory.
- Implemented a smoke test script to validate core API and web endpoints.
- Established TypeScript base configuration for consistent compilation settings.
- Introduced Turbo configuration for task management and build processes.

smoke-test.sh

@@ -0,0 +1,108 @@
+#!/bin/bash
+
+# Smoke tests for davinci-platform.
+# Validates core endpoints are responding correctly.
+#
+# Ports are configurable via environment variables so the smoke tests
+# can run against either the dev stack (3001/3000) or the isolated test
+# stack (3101/3100).
+#
+# Usage:
+#   bash smoke-test.sh                        # Against dev stack
+#   API_PORT=4301 WEB_PORT=4001 bash smoke-test.sh  # Against test stack
+#   SKIP_WEB=1 bash smoke-test.sh             # API only (no web container)
+#   make smoke                                # Against dev stack (via Makefile)
+
+API="http://localhost:${API_PORT:-4300}"
+WEB="http://localhost:${WEB_PORT:-4000}"
+PASS=0
+FAIL=0
+RESULTS=""
+
+smoke() {
+  local label="$1"
+  local expect_code="$2"
+  local actual_code="$3"
+  local body="$4"
+
+  if [ "$actual_code" = "$expect_code" ]; then
+    PASS=$((PASS + 1))
+    RESULTS="$RESULTS\n  ✅ $label → $actual_code"
+  else
+    FAIL=$((FAIL + 1))
+    RESULTS="$RESULTS\n  ❌ $label → $actual_code (expected $expect_code)"
+    if [ -n "$body" ]; then
+      RESULTS="$RESULTS\n     Body: $(echo "$body" | head -c 200)"
+    fi
+  fi
+}
+
+echo ""
+echo "========================================="
+echo "  DAVINCI PLATFORM SMOKE TESTS"
+echo "  API: $API"
+echo "  Web: $WEB"
+echo "========================================="
+echo ""
+
+# ─── API Tests ────────────────────────────────────────────────────
+
+# 1. Health endpoint
+RESP=$(curl -s -w "\n%{http_code}" "$API/health")
+BODY=$(echo "$RESP" | sed '$d')
+CODE=$(echo "$RESP" | tail -1)
+smoke "GET /health" "200" "$CODE" "$BODY"
+
+# 2. Health response contains status:ok
+if echo "$BODY" | grep -q '"status":"ok"'; then
+  smoke "Health body contains status:ok" "200" "200"
+else
+  smoke "Health body contains status:ok" "200" "FAIL" "$BODY"
+fi
+
+# 3. Unknown API route returns 404
+RESP=$(curl -s -w "\n%{http_code}" "$API/api/nonexistent")
+CODE=$(echo "$RESP" | tail -1)
+smoke "GET /api/nonexistent" "404" "$CODE"
+
+# ─── Web Tests ────────────────────────────────────────────────────
+
+if [ -n "$SKIP_WEB" ]; then
+  echo "  ⏭  Skipping web tests (SKIP_WEB is set)"
+else
+
+# 4. Web root redirects to locale
+RESP=$(curl -s -o /dev/null -w "%{http_code}" "$WEB/")
+smoke "GET / (redirect to locale)" "307" "$RESP"
+
+# 5. Web /en returns 200
+RESP=$(curl -sL -w "\n%{http_code}" "$WEB/en")
+BODY=$(echo "$RESP" | sed '$d')
+CODE=$(echo "$RESP" | tail -1)
+smoke "GET /en" "200" "$CODE"
+
+# 6. Web page contains expected content
+if echo "$BODY" | grep -q "Davinci Platform"; then
+  smoke "Page contains 'Davinci Platform'" "200" "200"
+else
+  smoke "Page contains 'Davinci Platform'" "200" "FAIL" "$BODY"
+fi
+
+fi # end SKIP_WEB
+
+# ─── Results ──────────────────────────────────────────────────────
+
+echo ""
+echo "========================================="
+echo "  RESULTS: $PASS passed, $FAIL failed"
+echo "========================================="
+echo -e "$RESULTS"
+echo ""
+
+if [ "$FAIL" -gt 0 ]; then
+  echo "❌ SMOKE TESTS FAILED"
+  exit 1
+else
+  echo "✅ ALL SMOKE TESTS PASSED"
+  exit 0
+fi