docs: add doc examples to operations

[kuhe]

Generates the ExamplesTrait data as JS @example code comment blocks for Commands (operations).

AWS Example:

/**
 *
 * @example To delete cors configuration on a bucket.
 * ```javascript
 * // The following example deletes CORS configuration on a bucket.
 * const input = {
 *   Bucket: "examplebucket"
 * };
 * const command = new DeleteBucketCorsCommand(input);
 * const response = await client.send(command);
 * /* response is
 * { /* metadata only *\/ }
 * *\/
 * ```
 *
 */
class DeleteBucketCorsCommand ...

[kuhe]

• todo: add unit tests