ui: 添加 NeoForge 手动安装 Tab

feat: NeoForge 自动安装 Stage 1
fix: StdVersion 可能错误地包含了 "neoforge-" 前缀
fix: 自动安装选择 NeoForge 时自动生成的核心名称存在重复字符串

Plain Craft Launcher 2/Pages/PageDownload/PageDownloadInstall.xaml.vb

@@ -499,7 +499,7 @@
             Name += "-Forge_" & SelectedForge.Version
         End If
         If SelectedNeoForge IsNot Nothing Then
-            Name += "-NeoForge_" & SelectedNeoForge.Version
+            Name += "-NeoForge_" & SelectedNeoForge.StdVersion & If(SelectedNeoForge.IsBeta, "-beta", "")
         End If
         If SelectedLiteLoader IsNot Nothing Then
             Name += "-LiteLoader"
@@ -521,7 +521,7 @@
             Info += ", Forge " & SelectedForge.Version
         End If
         If SelectedNeoForge IsNot Nothing Then
-            Info += ", NeoForge " & SelectedNeoForge.Version
+            Info += ", NeoForge " & SelectedNeoForge.StdVersion & If(SelectedNeoForge.IsBeta, "-beta", "")
         End If
         If SelectedLiteLoader IsNot Nothing Then
             Info += ", LiteLoader"