add necessary CMake files

.vscode/launch.json

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+{
+    // 使用 IntelliSense 了解相关属性。
+    // 悬停以查看现有属性的描述。
+    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "(Windows) 启动",
+            "type": "cppvsdbg",
+            "request": "launch",
+            "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${fileDirname}",
+            "environment": [],
+            "console": "integratedTerminal",
+            "preLaunchTask": "C/C++: cl.exe 生成活动文件"
+        },
+        {
+            "name": "(Windows) 启动 CMake 目标",
+            "type": "cppvsdbg",
+            "request": "launch",
+            "program": "${command:cmake.launchTargetPath}",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "console": "integratedTerminal"
+        },
+    ]
+}

.vscode/settings.json

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+{
+    "cSpell.words": [
+        "WSADATA"
+    ]
+}

.vscode/tasks.json

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+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "cppbuild",
+			"label": "C/C++: cl.exe 生成活动文件",
+			"command": "cl.exe",
+			"args": [
+				"/Zi",
+				"/EHsc",
+				"/nologo",
+				"/Fe${fileDirname}\\${fileBasenameNoExtension}.exe",
+				"${file}"
+			],
+			"options": {
+				"cwd": "${fileDirname}"
+			},
+			"problemMatcher": [
+				"$msCompile"
+			],
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			},
+			"detail": "编译器: cl.exe"
+		}
+	]
+}