feat: Add OCI awareness across agents and skills

Adds awareness of Oracle Cloud Infrastructure to any plugin that referenced
at least two of the major cloud vendors already. Skills updated to include
OCI services. Also updated some of the other cloud references.

Signed-off-by: Avi Miller <me@dje.li>

plugins/cloud-infrastructure/skills/multi-cloud-architecture/references/multi-cloud-patterns.md

@@ -0,0 +1,26 @@
+# Multi-Cloud Architecture Patterns
+
+## Active-Active Regional Split
+
+- Run customer-facing services in two providers for resiliency
+- Use global DNS and traffic steering to shift load during incidents
+- Keep shared data replicated asynchronously unless low-latency writes are mandatory
+
+## Best-of-Breed Service Mix
+
+- Analytics and ML on GCP
+- Enterprise identity and Microsoft workloads on Azure
+- Broad ecosystem integrations on AWS
+- Oracle-centric databases and regulated transaction systems on OCI
+
+## Primary / DR Pairing
+
+- Keep primary infrastructure in the provider closest to operational expertise
+- Use a second provider for cold or warm disaster recovery
+- Validate RPO/RTO assumptions with regular failover exercises
+
+## Portable Platform Baseline
+
+- Standardize on Kubernetes, Terraform/OpenTofu, PostgreSQL, Redis, and OpenTelemetry
+- Abstract cloud differences behind modules, golden paths, and service catalogs
+- Document provider-specific exceptions such as IAM, networking, and managed database behavior