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/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbCip/IAbCipTemplateReader.cs

@@ -0,0 +1,26 @@
+namespace ZB.MOM.WW.OtOpcUa.Driver.AbCip;
+
+/// <summary>
+///     Reads the raw Template Object (class 0x6C) blob for a given UDT template instance id
+///     off a Logix controller. The default production implementation (see
+///     <see cref="LibplctagTemplateReader"/>) uses libplctag's <c>@udt/{id}</c> pseudo-tag.
+///     Tests swap in a fake via <see cref="IAbCipTemplateReaderFactory"/>.
+/// </summary>
+public interface IAbCipTemplateReader : IDisposable
+{
+    /// <summary>
+    ///     Read the raw template bytes for <paramref name="templateInstanceId"/>. Returns the
+    ///     full blob the Read Template service produced — the managed <see cref="CipTemplateObjectDecoder"/>
+    ///     parses it into an <see cref="AbCipUdtShape"/>.
+    /// </summary>
+    Task<byte[]> ReadAsync(
+        AbCipTagCreateParams deviceParams,
+        uint templateInstanceId,
+        CancellationToken cancellationToken);
+}
+
+/// <summary>Factory for <see cref="IAbCipTemplateReader"/>.</summary>
+public interface IAbCipTemplateReaderFactory
+{
+    IAbCipTemplateReader Create();
+}