chore: organize solution into module folders (Core/Server/Drivers/Client/Tooling)

Group all 69 projects into category subfolders under src/ and tests/ so the
Rider Solution Explorer mirrors the module structure. Folders: Core, Server,
Drivers (with a nested Driver CLIs subfolder), Client, Tooling.

- Move every project folder on disk with git mv (history preserved as renames).
- Recompute relative paths in 57 .csproj files: cross-category ProjectReferences,
  the lib/ HintPath+None refs in Driver.Historian.Wonderware, and the external
  mxaccessgw refs in Driver.Galaxy and its test project.
- Rebuild ZB.MOM.WW.OtOpcUa.slnx with nested solution folders.
- Re-prefix project paths in functional scripts (e2e, compliance, smoke SQL,
  integration, install).

Build green (0 errors); unit tests pass. Docs left for a separate pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/Client/ZB.MOM.WW.OtOpcUa.Client.UI/Views/AckAlarmWindow.axaml

@@ -0,0 +1,39 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        x:Class="ZB.MOM.WW.OtOpcUa.Client.UI.Views.AckAlarmWindow"
+        Title="Acknowledge Alarm"
+        Width="420"
+        SizeToContent="Height"
+        MinHeight="240"
+        WindowStartupLocation="CenterOwner"
+        CanResize="False">
+    <StackPanel Margin="16" Spacing="12">
+        <TextBlock Text="Acknowledge Alarm" FontWeight="Bold" FontSize="16" />
+
+        <StackPanel Spacing="4">
+            <TextBlock Text="Source:" FontSize="12" Foreground="Gray" />
+            <TextBlock Name="SourceText" FontWeight="SemiBold" />
+        </StackPanel>
+
+        <StackPanel Spacing="4">
+            <TextBlock Text="Condition:" FontSize="12" Foreground="Gray" />
+            <TextBlock Name="ConditionText" />
+        </StackPanel>
+
+        <StackPanel Spacing="4">
+            <TextBlock Text="Comment:" FontSize="12" Foreground="Gray" />
+            <TextBox Name="CommentInput"
+                     Watermark="Enter acknowledgment comment"
+                     AcceptsReturn="True"
+                     Height="60"
+                     TextWrapping="Wrap" />
+        </StackPanel>
+
+        <TextBlock Name="ResultText" Foreground="Gray" />
+
+        <StackPanel Orientation="Horizontal" Spacing="8" HorizontalAlignment="Right">
+            <Button Name="AckButton" Content="Acknowledge" />
+            <Button Name="CancelButton" Content="Cancel" />
+        </StackPanel>
+    </StackPanel>
+</Window>