docs: add firmware provider to providers docs (#8993)

packages/web/src/content/docs/providers.mdx

@@ -558,6 +558,33 @@ Cloudflare AI Gateway lets you access models from OpenAI, Anthropic, Workers AI,
 
 ---
 
+### Firmware
+
+1. Head over to the [Firmware dashboard](https://app.firmware.ai/signup), create an account, and generate an API key.
+
+2. Run the `/connect` command and search for **Firmware**.
+
+   ```txt
+   /connect
+   ```
+
+3. Enter your Firmware API key.
+
+   ```txt
+   ┌ API key
+   │
+   │
+   └ enter
+   ```
+
+4. Run the `/models` command to select a model.
+
+   ```txt
+   /models
+   ```
+
+---
+
 ### Fireworks AI
 
 1. Head over to the [Fireworks AI console](https://app.fireworks.ai/), create an account, and click **Create API Key**.