feat: add standalone LmxProxy solution, windev VM documentation

Split LmxProxy Host and Client into a self-contained solution under lmxproxy/,
ported from the ScadaBridge monorepo with updated namespaces (ZB.MOM.WW.LmxProxy.*).
Client project (.NET 10) inlines Core/DataEngine dependencies and builds clean.
Host project (.NET Fx 4.8) retains ArchestrA.MXAccess for Windows deployment.
Added windev.md documenting the WW_DEV_VM development environment setup.

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/appsettings.json

@@ -0,0 +1,84 @@
+{
+  "GrpcPort": 50051,
+  "ApiKeyConfigFile": "apikeys.json",
+  "Subscription": {
+    "ChannelCapacity": 1000,
+    "ChannelFullMode": "DropOldest"
+  },
+  "ServiceRecovery": {
+    "FirstFailureDelayMinutes": 1,
+    "SecondFailureDelayMinutes": 5,
+    "SubsequentFailureDelayMinutes": 10,
+    "ResetPeriodDays": 1
+  },
+  "Connection": {
+    "MonitorIntervalSeconds": 5,
+    "ConnectionTimeoutSeconds": 30,
+    "AutoReconnect": true,
+    "ReadTimeoutSeconds": 5,
+    "WriteTimeoutSeconds": 5,
+    "MaxConcurrentOperations": 10
+  },
+  "PerformanceMetrics": {
+    "ReportingIntervalSeconds": 60,
+    "Enabled": true,
+    "MaxSamplesPerMetric": 1000
+  },
+  "HealthCheck": {
+    "Enabled": true,
+    "TestTagAddress": "TestChannel.TestDevice.TestTag",
+    "MaxStaleDataMinutes": 5
+  },
+  "RetryPolicies": {
+    "ReadRetryCount": 3,
+    "WriteRetryCount": 3,
+    "ConnectionRetryCount": 5,
+    "CircuitBreakerThreshold": 5,
+    "CircuitBreakerDurationSeconds": 30
+  },
+  "Tls": {
+    "Enabled": true,
+    "ServerCertificatePath": "certs/server.crt",
+    "ServerKeyPath": "certs/server.key",
+    "ClientCaCertificatePath": "certs/ca.crt",
+    "RequireClientCertificate": false,
+    "CheckCertificateRevocation": false
+  },
+  "WebServer": {
+    "Enabled": true,
+    "Port": 8080
+  },
+  "Serilog": {
+    "MinimumLevel": {
+      "Default": "Information",
+      "Override": {
+        "Microsoft": "Warning",
+        "System": "Warning",
+        "Grpc": "Information"
+      }
+    },
+    "WriteTo": [
+      {
+        "Name": "Console",
+        "Args": {
+          "theme": "Serilog.Sinks.SystemConsole.Themes.AnsiConsoleTheme::Code, Serilog.Sinks.Console",
+          "outputTemplate": "[{Timestamp:HH:mm:ss} {Level:u3}] {Message:lj} {Properties:j}{NewLine}{Exception}"
+        }
+      },
+      {
+        "Name": "File",
+        "Args": {
+          "path": "logs/lmxproxy-.txt",
+          "rollingInterval": "Day",
+          "retainedFileCountLimit": 30,
+          "outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level:u3}] {SourceContext} {Message:lj}{NewLine}{Exception}"
+        }
+      }
+    ],
+    "Enrich": [
+      "FromLogContext",
+      "WithMachineName",
+      "WithThreadId"
+    ]
+  }
+}