Add README.md and tutorial walkthrough for script-only tutorials

Author: mwunderl

tuts/120-aws-sts-gs/README.md

@@ -0,0 +1,39 @@
+# Aws Sts Gs
+
+An AWS CLI tutorial that demonstrates Iam operations.
+
+## Running
+
+```bash
+bash aws-sts-gs.sh
+```
+
+To auto-run with cleanup:
+
+```bash
+echo 'y' | bash aws-sts-gs.sh
+```
+
+## What it does
+
+1. Getting caller identity
+2. Creating a role to assume
+3. Assuming the role
+4. Using temporary credentials
+5. Session tags (decode token)
+
+## Resources created
+
+- Role
+- Role Policy
+
+The script prompts you to clean up resources when it finishes.
+
+## Cost
+
+Free tier eligible for most operations. Clean up resources after use to avoid charges.
+
+## Related docs
+
+- [AWS CLI iam reference](https://docs.aws.amazon.com/cli/latest/reference/iam/index.html)
+

tuts/120-aws-sts-gs/aws-sts-gs.md

@@ -0,0 +1,31 @@
+# Aws Sts Gs
+
+## Prerequisites
+
+1. AWS CLI installed and configured (`aws configure`)
+2. Appropriate IAM permissions for the AWS services used
+
+## Step 1: Getting caller identity
+
+The script handles this step automatically. See `aws-sts-gs.sh` for the exact CLI commands.
+
+## Step 2: Creating a role to assume
+
+The script handles this step automatically. See `aws-sts-gs.sh` for the exact CLI commands.
+
+## Step 3: Assuming the role
+
+The script handles this step automatically. See `aws-sts-gs.sh` for the exact CLI commands.
+
+## Step 4: Using temporary credentials
+
+The script handles this step automatically. See `aws-sts-gs.sh` for the exact CLI commands.
+
+## Step 5: Session tags (decode token)
+
+The script handles this step automatically. See `aws-sts-gs.sh` for the exact CLI commands.
+
+## Cleanup
+
+The script prompts you to clean up all created resources. If you need to clean up manually, check the script log for the resource names that were created.
+