add support to load/override model settings

website/docs/llms/warnings.md

@@ -8,10 +8,45 @@ nav_order: 900
 {% include model-warnings.md %}
 
 
+## Adding settings for missing models
+You can register model settings used by aider for unknown models. 
+Create a `.aider.models.yml` file in one of these locations:
+
+- Your home directory.
+- The root if your git repo.
+- The current directory where you launch aider.
+- Or specify a specific file with the `--model-settings-file <filename>` switch.
+
+If the files above exist, they will be loaded in that order. 
+Files loaded last will take priority.
+
+The yaml file should be a a list of dictionary objects for each model, as follows:
+
+```
+- name: "gpt-3.5-turbo"
+  edit_format: "whole"
+  weak_model_name: "gpt-3.5-turbo"
+  use_repo_map: false
+  send_undo_reply: false
+  accepts_images: false
+  lazy: false
+  reminder_as_sys_msg: true
+  examples_as_sys_msg: false
+- name: "gpt-4-turbo-2024-04-09"
+  edit_format: "udiff"
+  weak_model_name: "gpt-3.5-turbo"
+  use_repo_map: true
+  send_undo_reply: true
+  accepts_images: true
+  lazy: true
+  reminder_as_sys_msg: true
+  examples_as_sys_msg: false
+```
+
 ## Specifying context window size and token costs
 
 You can register context window limits and costs for models that aren't known
-to aider. Create a `.aider.models.json` file in one of these locations:
+to aider. Create a `.aider.litellm.models.json` file in one of these locations:
 
 - Your home directory.
 - The root if your git repo.