docs: provider and distro codegen migration (#3531)

# What does this PR do?

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<!-- Closes #[issue-number] -->

- Updates provider and distro codegen to handle the new format
- Migrates provider and distro files to the new format

## Test Plan

- Manual testing

<!-- Describe the tests you ran to verify your changes with result summaries. *Provide clear instructions so the plan can be easily re-executed.* -->

docs/docs/providers/inference/remote_openai.mdx

@@ -0,0 +1,25 @@
+---
+description: "OpenAI inference provider for accessing GPT models and other OpenAI services."
+sidebar_label: Remote - Openai
+title: remote::openai
+---
+
+# remote::openai
+
+## Description
+
+OpenAI inference provider for accessing GPT models and other OpenAI services.
+
+## Configuration
+
+| Field | Type | Required | Default | Description |
+|-------|------|----------|---------|-------------|
+| `api_key` | `str \| None` | No |  | API key for OpenAI models |
+| `base_url` | `<class 'str'>` | No | https://api.openai.com/v1 | Base URL for OpenAI API |
+
+## Sample Configuration
+
+```yaml
+api_key: ${env.OPENAI_API_KEY:=}
+base_url: ${env.OPENAI_BASE_URL:=https://api.openai.com/v1}
+```