Add some missing docs for yaml support

docs/guides/runtime/import-yaml.md

@@ -0,0 +1,76 @@
+---
+name: Import a YAML file
+---
+
+Bun natively supports `.yaml` and `.yml` imports.
+
+```yaml#config.yaml
+database:
+  host: localhost
+  port: 5432
+  name: myapp
+
+server:
+  port: 3000
+  timeout: 30
+
+features:
+  auth: true
+  rateLimit: true
+```
+
+---
+
+Import the file like any other source file.
+
+```ts
+import config from "./config.yaml";
+
+config.database.host; // => "localhost"
+config.server.port; // => 3000
+config.features.auth; // => true
+```
+
+---
+
+You can also use named imports to destructure top-level properties:
+
+```ts
+import { database, server, features } from "./config.yaml";
+
+console.log(database.name); // => "myapp"
+console.log(server.timeout); // => 30
+console.log(features.rateLimit); // => true
+```
+
+---
+
+Bun also supports [Import Attributes](https://github.com/tc39/proposal-import-attributes) syntax:
+
+```ts
+import config from "./config.yaml" with { type: "yaml" };
+
+config.database.port; // => 5432
+```
+
+---
+
+For parsing YAML strings at runtime, use `Bun.YAML.parse()`:
+
+```ts
+const yamlString = `
+name: John Doe
+age: 30
+hobbies:
+  - reading
+  - coding
+`;
+
+const data = Bun.YAML.parse(yamlString);
+console.log(data.name); // => "John Doe"
+console.log(data.hobbies); // => ["reading", "coding"]
+```
+
+---
+
+See [Docs > API > YAML](https://bun.com/docs/api/yaml) for complete documentation on YAML support in Bun.