Add Oracle Analytics skills

[akatkere]

Summary

Add Oracle Analytics skills and establish analytics/ as the routing entry point for future Oracle Analytics skills.

Included Skills

• analytics
• analytics/workbook-authoring

Installation

After merge, install workbook authoring directly with:

npx skills add oracle/skills/analytics/workbook-authoring -a codex -y

Or install the Analytics router with:

npx skills add oracle/skills/analytics -a codex -y

Validation

• Agent Skills metadata and navigation validation passed
• Public-content and credential audit passed
• Public analytics namespace was exact-synchronized
• Documentation was updated for the analytics domain
• Both skill paths were discovered and installed with npx skills from a local checkout

How to Validate

From a checkout of this pull request, run:

npx skills add ./analytics -a codex -y
npx skills add ./analytics/workbook-authoring -a codex -y

Confirm that the first command discovers and installs the analytics routing skill and the second independently discovers and installs workbook-authoring.

For prerequisites, Oracle Analytics MCP setup, example requests, expected output, installation updates, and troubleshooting, see the Workbook Authoring Skill End User Guide.

Closes #114