docs(contact-center): add SDK manifest generator for cross-repo sync

[ciscoRankush]

COMPLETES #N/A (new tooling initiative)

This pull request addresses

The need for automated cross-repo SDK synchronization. When SDK APIs change (methods, events, types), consumer repos (ccWidgets) currently discover breakage through manual changelog reading, compile-time errors, or runtime failures. There is no machine-readable contract that consumers can programmatically diff to detect what changed.

by making the following changes

• scripts/generate-manifest.ts: ts-morph based AST analysis script that statically analyzes the @webex/contact-center package and extracts all exported classes (with public methods, params, return types, event emissions), enums, types/interfaces, and constants into a structured YAML file.
• sdk-manifest.yaml: Auto-generated machine-readable API surface contract. Added to package.json files array so it ships with the npm package. Consumers can diff this between versions to detect API changes.
• package.json: Added generate:manifest script and files array including sdk-manifest.yaml.
• .claude/commands/generate-manifest.md: /generate-manifest Claude Code skill for developers to regenerate the manifest locally.

Key capabilities:

• Extracts 3 classes, 37 public methods, 2 event enums, 71 types, 2 constants
• Resolves this.trigger()/this.emit() calls to actual event string values
• Deduplicates re-exported classes and type-only enum re-exports
• Sanitizes absolute paths to relative package paths

Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Tooling change
• Internal code refactor

The following scenarios were tested

• Ran npx ts-node scripts/generate-manifest.ts — generates sdk-manifest.yaml with 3 classes, 37 methods, 2 enums, 71 types, 2 constants
• Verified event extraction: startTranscription correctly maps to task:transcriptionStarted (success) and task:transcriptionFailed (failure)
• Verified deduplication: default class re-export and TaskEvents/AgentEvents type re-exports excluded
• Verified no absolute paths in output YAML
• End-to-end test: simulated API change (added param to stationLogin), regenerated manifest, diffed against previous version — change correctly detected

The GAI Coding Policy And Copyright Annotation Best Practices

• GAI was not used (or, no additional notation is required)
• Code was generated entirely by GAI
• GAI was used to create a draft that was subsequently customized or modified
• Coder created a draft manually that was non-substantively modified by GAI (e.g., refactoring was performed by GAI on manually written code)
• Tool used for AI assistance (GitHub Copilot / Other - specify)
  • Github Copilot
  • Other - Claude Code (Anthropic)
• This PR is related to
  • Feature
  • Defect fix
  • Tech Debt
  • Automation

I certified that

• I have read and followed contributing guidelines
• I discussed changes with code owners prior to submitting this pull request
• I have not skipped any automated checks
• All existing and new tests passed
• I have updated the documentation accordingly