Add references/examples.md generation instructions to skill-creator

The skill-creator currently generates only SKILL.md but doesn't include instructions for generating references/examples.md. The original Java reference examples were added manually (without updating the skill-creator).

A proposed a structured spec for references/examples.md (required for all SDK skills) covering:

Reference File: references/examples.md (Required for all SDK skills)

Every Azure SDK skill MUST include a references/examples.md file containing complete, runnable code examples. This file supplements SKILL.md (which shows only the core workflow) with comprehensive coverage of all major SDK operations. Structure — follow this exact order:

1. Title: # <Azure Service> <Language> SDK - Examples
2. One-line description: "Comprehensive code examples for the for ."
3. Table of Contents: Markdown links to all H2 sections below
4. Dependency/Installation: Full dependency block (Maven XML, pip, npm, NuGet, Cargo) — include BOM approach where available
5. Client Creation: Show ALL supported auth methods, each as an H3:
   • Service-specific credential (API key, shared key, connection string)
   • DefaultAzureCredential (mark as "Recommended")
   • Async client variant
6. Operation Sections (one H2 per logical group): Complete, copy-paste-ready code for every major API operation the SDK exposes. Each example must:
   • Import all required classes
   • Show realistic parameter values (not just "string")
   • Print or return results so the user sees output
   • Include inline comments only where behavior is non-obvious
7. Error Handling: Try/catch with HTTP status code switching and service-specific exceptions
8. Complete Application Example: A single end-to-end class/script using multiple operations together (create → use → cleanup)
9. Environment Variables: Bash block listing all required env vars
10. Best Practices: Numbered list (5-8 items) of SDK-specific guidance Rules:

• Use --- horizontal rules between major sections
• Every code block must be self-contained (copy-paste-runnable in isolation)
• Do NOT truncate examples — show complete method bodies
• Match the language idioms: Builder pattern (Java), async/await (TS/Python), IDisposable (C#), Result (Rust)
• Target 400-800 lines total — enough for comprehensive coverage without bloat

Adding this to the skill-creator would ensure consistency across all languages when skills are regenerated.

Impact: All language skills would need regeneration once this is added.

Context:

• Current skill-creator: https://github.com/microsoft/skills/blob/main/.github/skills/skill-creator/SKILL.md
• Original PR that added Java reference examples (no skill-creator changes): TBD (by @thegovind)