feat: Add gpt-5.5 support (#9488)

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Hopefully most of the checks are not applicable to this change :)

I've used this version locally, it seem to work just fine. As per
`thinking` setting, now sure what the policy is --
previous openai models that support reasoning are not marked as such.
Description is copied from the
[official model
card](https://developers.openai.com/api/docs/models/gpt-5.5)

Author: domwst

packages/llm-info/data/models.yml

@@ -84,6 +84,13 @@
 
 # OpenAI
 
+- name: GPT-5.5
+  model: gpt-5.5
+  description: Newest frontier model for the most complex professional work
+  providers: [openai]
+  roles: [chat, edit]
+  thinking: true
+
 - name: GPT-5.4
   model: gpt-5.4
   description: The latest frontier-grade model, unifying the Codex and GPT lines into a single system