docs(stepfunctions): integrationPattern update (#29015)

### Issue # (if applicable)

Closes #21915 . (Doesn't close it, but solves a point that was mentioned here)

### Reason for this change

The prop is pretty useful, but hasn't received enough documentation from my perspective. This adds documentation to the overview `README` as well it's own jsdoc.

### Description of changes

Added a section for the `integrationPattern` into the README, and updated the jsdoc to include more detailed information.

### Description of how you validated changes

No validation.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/aws-cdk-lib/aws-stepfunctions/README.md

@@ -708,6 +708,22 @@ const submitJob = new tasks.LambdaInvoke(this, 'Submit Job', {
 See [the AWS documentation](https://docs.aws.amazon.com/step-functions/latest/dg/concepts-access-cross-acct-resources.html)
 to learn more about AWS Step Functions support for accessing resources in other AWS accounts.
 
+## Service Integration Patterns
+
+AWS Step functions integrate directly with other services, either through an optimised integration pattern, or through the AWS SDK.
+Therefore, it is possible to change the `integrationPattern` of services, to enable additional functionality of the said AWS Service:
+
+```ts
+import * as glue from "@aws-cdk/aws-glue-alpha";
+
+declare const submitGlue: glue.Job;
+
+const submitJob = new tasks.GlueStartJobRun(this, "Submit Job", {
+  glueJobName: submitGlue.jobName,
+  integrationPattern: sfn.IntegrationPattern.RUN_JOB,
+});
+```
+
 ## State Machine Fragments
 
 It is possible to define reusable (or abstracted) mini-state machines by

packages/aws-cdk-lib/aws-stepfunctions/lib/states/task-base.ts

@@ -111,9 +111,11 @@ export interface TaskStateBaseProps {
 
   /**
    * AWS Step Functions integrates with services directly in the Amazon States Language.
-   * You can control these AWS services using service integration patterns
+   * You can control these AWS services using service integration patterns.
    *
-   * @see https://docs.aws.amazon.com/step-functions/latest/dg/connect-to-resource.html#connect-wait-token
+   * Depending on the AWS Service, the Service Integration Pattern availability will vary.
+   *
+   * @see https://docs.aws.amazon.com/step-functions/latest/dg/connect-supported-services.html
    *
    * @default - `IntegrationPattern.REQUEST_RESPONSE` for most tasks.
    * `IntegrationPattern.RUN_JOB` for the following exceptions: