OCI Database Cloud Services : Skills for BaseDB Worflow

[Kushal34563]

Description:
This PR adds a comprehensive BaseDB skill for managing Oracle Base Database Service virtual machine DB systems through OCI MCP operations.

The skill supports the full BaseDB resource hierarchy:

• Compartments
• VCNs and Subnets
• DBSystems
• DB Homes
• Databases/CDBs
• Pluggable Databases/PDBs
• Backups and Data Guard Associations

Key capabilities include:

• No mutation calls allowed
• Guided collection of required and optional parameters.
• Hierarchy-aware inspect, and list flows.
• OCI MCP operations through oracle/mcp oci-api-mcp-server.
• Availability domain, VM shape, and database-version discovery guidance.
• RSA-2048-or-stronger SSH key requirements and safe handling of passwords, private keys, and other sensitive values.
• Clear boundaries for compartments, VCNs, subnets, NSGs, and other external dependencies.
• Guardrails against unsupported service families, invented values, and unsafe destructive actions.

The skill is organized around a central workflow guide and OCI MCP references.