Implement OnUnhandledReducerError (#295)

## Description of Changes
SDK side of clockworklabs/SpacetimeDB#2636
Addresses
#281

## API

 - [ ] This is an API breaking change to the SDK

## Requires SpacetimeDB PRs
clockworklabs/SpacetimeDB#2636

## Testsuite
*If you would like to run the your SDK changes in this PR against a
specific SpacetimeDB branch, specify that here. This can be a branch
name or a link to a PR.*

SpacetimeDB branch name: jgilles/on-unhandled-reducer-error

## Testing

- [ ] Add a test that this works to the regression-tests example module

Author: kazimuth

examples~/quickstart-chat/client/module_bindings/Reducers/IdentityConnected.g.cs

@@ -17,7 +17,18 @@ public sealed partial class RemoteReducers : RemoteBase
 
         public bool InvokeIdentityConnected(ReducerEventContext ctx, Reducer.IdentityConnected args)
         {
-            if (OnIdentityConnected == null) return false;
+            if (OnIdentityConnected == null)
+            {
+                if (InternalOnUnhandledReducerError != null)
+                {
+                    switch (ctx.Event.Status)
+                    {
+                        case Status.Failed(var reason): InternalOnUnhandledReducerError(ctx, new Exception(reason)); break;
+                        case Status.OutOfEnergy(var _): InternalOnUnhandledReducerError(ctx, new Exception("out of energy")); break;
+                    }
+                }
+                return false;
+            }
             OnIdentityConnected(
                 ctx
             );

examples~/quickstart-chat/client/module_bindings/Reducers/IdentityDisconnected.g.cs

@@ -17,7 +17,18 @@ public sealed partial class RemoteReducers : RemoteBase
 
         public bool InvokeIdentityDisconnected(ReducerEventContext ctx, Reducer.IdentityDisconnected args)
         {
-            if (OnIdentityDisconnected == null) return false;
+            if (OnIdentityDisconnected == null)
+            {
+                if (InternalOnUnhandledReducerError != null)
+                {
+                    switch (ctx.Event.Status)
+                    {
+                        case Status.Failed(var reason): InternalOnUnhandledReducerError(ctx, new Exception(reason)); break;
+                        case Status.OutOfEnergy(var _): InternalOnUnhandledReducerError(ctx, new Exception("out of energy")); break;
+                    }
+                }
+                return false;
+            }
             OnIdentityDisconnected(
                 ctx
             );

examples~/quickstart-chat/client/module_bindings/Reducers/SendMessage.g.cs

@@ -22,7 +22,18 @@ public void SendMessage(string text)
 
         public bool InvokeSendMessage(ReducerEventContext ctx, Reducer.SendMessage args)
         {
-            if (OnSendMessage == null) return false;
+            if (OnSendMessage == null)
+            {
+                if (InternalOnUnhandledReducerError != null)
+                {
+                    switch (ctx.Event.Status)
+                    {
+                        case Status.Failed(var reason): InternalOnUnhandledReducerError(ctx, new Exception(reason)); break;
+                        case Status.OutOfEnergy(var _): InternalOnUnhandledReducerError(ctx, new Exception("out of energy")); break;
+                    }
+                }
+                return false;
+            }
             OnSendMessage(
                 ctx,
                 args.Text

examples~/quickstart-chat/client/module_bindings/Reducers/SetName.g.cs

@@ -22,7 +22,18 @@ public void SetName(string name)
 
         public bool InvokeSetName(ReducerEventContext ctx, Reducer.SetName args)
         {
-            if (OnSetName == null) return false;
+            if (OnSetName == null)
+            {
+                if (InternalOnUnhandledReducerError != null)
+                {
+                    switch (ctx.Event.Status)
+                    {
+                        case Status.Failed(var reason): InternalOnUnhandledReducerError(ctx, new Exception(reason)); break;
+                        case Status.OutOfEnergy(var _): InternalOnUnhandledReducerError(ctx, new Exception("out of energy")); break;
+                    }
+                }
+                return false;
+            }
             OnSetName(
                 ctx,
                 args.Name