minor #282 [OpenAI] Add GPT 5 Models (DZunke)

This PR was merged into the main branch.

Discussion
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[OpenAI] Add GPT 5 Models

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Docs?         | no
| Issues        |
| License       | MIT

The new GPT Models are out, so i have added them to the platform with default configuration for image support and structured output.

https://platform.openai.com/docs/models/gpt-5
https://platform.openai.com/docs/models/gpt-5-mini
https://platform.openai.com/docs/models/gpt-5-nano
https://platform.openai.com/docs/models/gpt-5-chat-latest

Commits
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e98d465 [Platform][OpenAI] Add GPT 5 Models

Author: chr-hertel

src/platform/src/Bridge/OpenAi/Gpt.php

@@ -35,6 +35,10 @@ class Gpt extends Model
     public const GPT_41 = 'gpt-4.1';
     public const GPT_41_MINI = 'gpt-4.1-mini';
     public const GPT_41_NANO = 'gpt-4.1-nano';
+    public const GPT_5 = 'gpt-5';
+    public const GPT_5_CHAT = 'gpt-5-chat-latest';
+    public const GPT_5_MINI = 'gpt-5-mini';
+    public const GPT_5_NANO = 'gpt-5-nano';
 
     private const IMAGE_SUPPORTING = [
         self::GPT_4_TURBO,
@@ -47,6 +51,10 @@ class Gpt extends Model
         self::GPT_41,
         self::GPT_41_MINI,
         self::GPT_41_NANO,
+        self::GPT_5,
+        self::GPT_5_MINI,
+        self::GPT_5_NANO,
+        self::GPT_5_CHAT,
     ];
 
     private const STRUCTURED_OUTPUT_SUPPORTING = [
@@ -57,6 +65,9 @@ class Gpt extends Model
         self::GPT_41,
         self::GPT_41_MINI,
         self::GPT_41_NANO,
+        self::GPT_5,
+        self::GPT_5_MINI,
+        self::GPT_5_NANO,
     ];
 
     /**