fix(mcp): add [McpServerToolType] attribute to all tool classes

Without this attribute, WithToolsFromAssembly does not discover
the tool methods and the server reports no tools capability.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

OpenNest.Mcp/Tools/InputTools.cs

@@ -10,6 +10,7 @@ using CncProgram = OpenNest.CNC.Program;
 
 namespace OpenNest.Mcp.Tools
 {
+    [McpServerToolType]
     public class InputTools
     {
         private readonly NestSession _session;

OpenNest.Mcp/Tools/InspectionTools.cs

@@ -8,6 +8,7 @@ using OpenNest.Math;
 
 namespace OpenNest.Mcp.Tools
 {
+    [McpServerToolType]
     public class InspectionTools
     {
         private readonly NestSession _session;

OpenNest.Mcp/Tools/NestingTools.cs

@@ -7,6 +7,7 @@ using OpenNest.Geometry;
 
 namespace OpenNest.Mcp.Tools
 {
+    [McpServerToolType]
     public class NestingTools
     {
         private readonly NestSession _session;

OpenNest.Mcp/Tools/SetupTools.cs

@@ -5,6 +5,7 @@ using OpenNest.Geometry;
 
 namespace OpenNest.Mcp.Tools
 {
+    [McpServerToolType]
     public class SetupTools
     {
         private readonly NestSession _session;