[JS] fix: assistants planner error details and message order (#899)

## Linked issues

closes: #806 #892

## Details

Fix issues in `AssistantsPlanner`

#### Change details

- Throw error with detailed code and message when run failed, from
OpenAI Run's `last_error` field.
- Reverse the messages returned from OpenAI's listMessages API, to
ensure responses in asc order.

## Attestation Checklist

- [X] My code follows the style guidelines of this project

- I have checked for/fixed spelling, linting, and other errors
- I have commented my code for clarity
- I have made corresponding changes to the documentation (we use
[TypeDoc](https://typedoc.org/) to document our code)
- My changes generate no new warnings
- I have added tests that validates my changes, and provides sufficient
test coverage. I have tested with:
  - Local testing
  - E2E testing in Teams
- New and existing unit tests pass locally with my changes

### Additional information

> Feel free to add other relevant information below

js/packages/teams-ai/src/planners/AssistantsPlanner.ts

@@ -311,7 +311,9 @@ export class AssistantsPlanner<TState extends TurnState = TurnState> implements
             case 'expired':
                 return { type: 'plan', commands: [{type: 'DO', action: AI.TooManyStepsActionName} as PredictedDoCommand] };
             default:
-                throw new Error(`Run failed ${results.status}`);
+                throw new Error(
+                    `Run failed ${results.status}. ErrorCode: ${results.last_error?.code}. ErrorMessage: ${results.last_error?.message}`
+                );
         }
     }
 
@@ -346,7 +348,9 @@ export class AssistantsPlanner<TState extends TurnState = TurnState> implements
             case 'expired':
                 return { type: 'plan', commands: [{type: 'DO', action: AI.TooManyStepsActionName} as PredictedDoCommand] };
             default:
-                throw new Error(`Run failed ${results.status}`);
+                throw new Error(
+                    `Run failed ${results.status}. ErrorCode: ${results.last_error?.code}. ErrorMessage: ${results.last_error?.message}`
+                );
         }
     }
 
@@ -384,6 +388,9 @@ export class AssistantsPlanner<TState extends TurnState = TurnState> implements
             }
         }
 
+        // listMessages return messages in desc, reverse to be in asc order
+        newMessages.reverse();
+
         // Convert the messages to SAY commands
         const plan: Plan = { type: 'plan', commands: [] };
         newMessages.forEach(message => {