perf: Optimize network scan speed and defaults

- Change default scan type from 'os' to 'quick' (much faster)
- Add -T4 timing template for aggressive speed
- Add --min-hostgroup for parallel host scanning
- Remove slow OS detection from quick scan
- Add time estimates in UI: ping ~30s, quick ~1-3min, os ~5-15min
- Color-coded scan options by speed
- ping scan: fastest, just host discovery
- quick scan: top 100 ports, no OS detection

services/hackgpt-api/app/from fastapi import FastAPI.py

@@ -0,0 +1,21 @@
+from fastapi import FastAPI
+from starlette.middleware.cors import CORSMiddleware
+import os
+
+app = FastAPI()
+
+# CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # Allows all origins
+    allow_credentials=True,
+    allow_methods=["*"],  # Allows all methods
+    allow_headers=["*"],  # Allows all headers
+)
+
+LLM_ROUTER_URL = os.getenv("LLM_ROUTER_URL", "http://strikepackage-llm-router:8000")
+
+
+@app.get("/")
+async def root():
+    return {"message": "Hello World"}