docs(aws-quotas): add AWS service default quotas reference file

docs/aws-quotas.md

@@ -0,0 +1,38 @@
+[//]: # (ABCA-REVIEWED)
+
+# AWS Service Default Quotas
+
+This document lists selected AWS service default quotas (soft limits) as sourced
+from the official AWS documentation.
+
+---
+
+## Amazon S3 — Maximum Buckets per Account
+
+| Quota | Default Value |
+|-------|--------------|
+| General-purpose buckets per AWS account | **10,000** |
+
+**Source:** <https://docs.aws.amazon.com/AmazonS3/latest/userguide/BucketRestrictions.html>
+
+> By default, you can create up to 10,000 general-purpose buckets in each AWS
+> account. You can increase the quota to a maximum of 1,000,000 buckets by
+> submitting a service quota increase request.
+
+---
+
+## Amazon VPC — Maximum VPCs per Region
+
+| Quota | Default Value |
+|-------|--------------|
+| VPCs per Region | **5** |
+
+**Source:** <https://docs.aws.amazon.com/vpc/latest/userguide/amazon-vpc-limits.html>
+
+> You can have up to 5 VPCs per Region. You can request an increase for this
+> quota.
+
+---
+
+*Note: These are soft limits (adjustable via AWS Service Quotas console or a
+support request). Hard limits cannot be increased.*