feat: 合并星图和聊天页面为 MainPage，响应式 GridRow 布局

- 新建 MainPage.ets，用 GridRow 响应式布局组合星图+聊天
- Index.ets 改为 2 Tab（TrulyMEM + 设置）
- GraphPage/ChatPage 接收 @Prop db 从父组件传入
- 恢复 README.md / README_EN.md 的特别鸣谢部分

harmonyos/entry/build-profile.json5

@@ -1,10 +1,38 @@
 {
   "apiType": "stageMode",
-  "buildOption": {},
+  "buildOption": {
+    "resOptions": {
+      "copyCodeResource": {
+        "enable": false
+      }
+    }
+  },
+  "buildOptionSet": [
+    {
+      "name": "release",
+      "arkOptions": {
+        "obfuscation": {
+          "ruleOptions": {
+            "enable": true,
+            "files": [
+              "./obfuscation-rules.txt"
+            ]
+          }
+        }
+      },
+      "resOptions": {
+        "copyCodeResource": {
+          "enable": false
+        }
+      }
+    },
+  ],
   "targets": [
     {
-      "name": "default",
-      "runtimeOS": "HarmonyOS"
+      "name": "default"
+    },
+    {
+      "name": "ohosTest",
     }
   ]
-}
+}