feat: 项目初始化 + 3D方块世界原型 + AI助搭系统

初始化 monorepo: Go后端(7微服务) + Unity客户端(9模块) + 启动器

HTML5原型: Three.js 3D体素世界, Perlin噪声地形, 原版材质, 22种方块

Minecraft创造模式背包: 双栏布局, 拖拽移动物品, 方向性元件引脚

AI助搭策划文档 + 客户端/服务端骨架 + Docker Compose + CI

launcher/PCL-CE/Plain Craft Launcher 2/Controls/MyHint.xaml

@@ -0,0 +1,21 @@
+<Border x:Class="PCL.MyHint" x:Name="PanBack"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:local="clr-namespace:PCL"
+        FocusVisualStyle="{x:Null}"
+        UseLayoutRounding="True" SnapsToDevicePixels="True" HorizontalAlignment="Stretch" BorderThickness="3,0,0,0"
+        BorderBrush="#99FF4444" CornerRadius="2">
+    <Grid UseLayoutRounding="False" SnapsToDevicePixels="False">
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="1*" />
+            <ColumnDefinition Width="Auto" />
+        </Grid.ColumnDefinitions>
+        <TextBlock IsHitTestVisible="False" x:Name="LabText" LineHeight="16" Margin="0,0,0,-1" Padding="12,9"
+                   VerticalAlignment="Center" TextWrapping="Wrap" />
+        <local:MyIconButton x:Name="BtnClose" Visibility="Collapsed" Theme="Custom" Margin="0,0,8,0" Grid.Column="1" Click="BtnClose_Click"
+                            Height="20" Width="20" VerticalAlignment="Center"
+                            SvgIcon="lucide/x"
+                            ToolTip="{DynamicResource Common.Hint.DoNotShowAgain}" ToolTipService.Placement="Center" ToolTipService.VerticalOffset="29"
+                            ToolTipService.HorizontalOffset="2" />
+    </Grid>
+</Border>