Closes #201

Description

This PR adds a new Oracle Cloud Infrastructure (OCI) Linux template for provisioning Coder workspaces. The template includes compute instances, networking (VCN, subnet, internet gateway), and storage configuration as requested in issue #201.

Type of Change

• New module
• Bug fix
• Feature/enhancement
• Documentation
• Other

Module Information

Path: registry/coder/templates/oci-linux
New version: v1.0.0
Breaking change: [ ] Yes [x] No

Testing & Validation

• Tests pass (bun test)
• Code formatted (bun run fmt)
• Changes tested locally
• Terraform validation passes

Related Issues

Closes #201 - Add Oracle Cloud Infrastructure (OCI) template example

/claim #201