feat: integrate Google semantic search and branded desktop launcher

crates/searchi-service/benchmarks/windows-cpu-ann-100k.json

@@ -0,0 +1,16 @@
+{
+  "ann_p95_ms": 1.3722,
+  "ann_recall_at10": 0.9850000000000001,
+  "database_ms": 39209.1035,
+  "dimensions": 768,
+  "graph_build_ms": 57950.0959,
+  "graph_memory_bytes": 554453184,
+  "hardware": "skylake",
+  "initial_eligibility_ms": 1612.2069999999999,
+  "kind": "synthetic index-only benchmark, not semantic-model quality",
+  "queries": 20,
+  "threads": 1,
+  "vectors": 100000,
+  "warm_passages_rehashed": 0,
+  "warm_service_p95_ms": 6.4033
+}