Initial MVP: drivable RX-7 vertical slice + server-authoritative systems

- Rojo + Wally project; ProfileStore (loleris) for safe saves
- Shared: GameConfig, Cars (RX-7 free starter), ProfileTemplate, Remotes
- Server: DataManager, Economy, CarManager, RaceManager, MapBuilder, AntiCheat
- Client: neon HUD + Garage/Dealership UI (buy/equip/upgrade), race/daily
- Procedural Tokyo expressway (spawn pad, finish line, neon pylons, kill walls)
- CI workflow (Gitea/GitHub), Makefile, selene+stylua clean, rojo builds
- Docs: README, GDD, realistic solo ROADMAP

default.project.json

@@ -0,0 +1,55 @@
+{
+  "name": "fnf-sim",
+  "tree": {
+    "$className": "DataModel",
+
+    "ReplicatedStorage": {
+      "$className": "ReplicatedStorage",
+      "Shared": {
+        "$path": "src/shared"
+      }
+    },
+
+    "ServerScriptService": {
+      "$className": "ServerScriptService",
+      "Server": {
+        "$path": "src/server"
+      },
+      "ServerPackages": {
+        "$path": "ServerPackages"
+      }
+    },
+
+    "StarterPlayer": {
+      "$className": "StarterPlayer",
+      "StarterPlayerScripts": {
+        "$className": "StarterPlayerScripts",
+        "Client": {
+          "$path": "src/client"
+        }
+      }
+    },
+
+    "Workspace": {
+      "$className": "Workspace",
+      "$properties": {
+        "Gravity": 196.2,
+        "StreamingEnabled": true
+      }
+    },
+
+    "Lighting": {
+      "$className": "Lighting",
+      "$properties": {
+        "ClockTime": 0.0,
+        "Brightness": 1.0,
+        "Ambient": [0.05, 0.05, 0.1],
+        "OutdoorAmbient": [0.1, 0.1, 0.18],
+        "FogEnd": 900.0,
+        "FogColor": [0.03, 0.03, 0.08],
+        "EnvironmentDiffuseScale": 0.4,
+        "GlobalShadows": true
+      }
+    }
+  }
+}