fix(slnx): 修复 solution folder 路径缺少末尾斜杠导致打开报错

.slnx 格式要求 folder path 必须以 / 结尾，/Solution Items → /Solution Items/

Author: AlianBlank

Server.slnx

@@ -0,0 +1,14 @@
+<Solution>
+  <Folder Name="/Solution Items/">
+    <File Path="docker-compose.yml" />
+    <File Path="Dockerfile" />
+    <File Path="logo.png" />
+    <File Path="README.md" />
+  </Folder>
+  <Project Path="GameFrameX.Launcher\GameFrameX.Launcher.csproj" />
+  <Project Path="GameFrameX.Hotfix\GameFrameX.Hotfix.csproj" />
+  <Project Path="GameFrameX.Config\GameFrameX.Config.csproj" />
+  <Project Path="GameFrameX.Proto\GameFrameX.Proto.csproj" />
+  <Project Path="GameFrameX.Apps\GameFrameX.Apps.csproj" />
+  <Project Path="GameFrameX.CodeGenerator\GameFrameX.CodeGenerator.csproj" />
+</Solution>