fix(cli): Generate accurate command references

[BYK]

Summary

• Keep agent-conversation usage and runnable examples in command metadata so help, generated docs, and CLI skills agree.
• Render optional, variadic, and compound argument syntax accurately across command references.
• Reject malformed organization and conversation IDs before target resolution or API access, and require the view target at parse time.

Testing

• On the merged tree, pnpm run tsc and pnpm run lint passed; CLI lint, policy, generated-file checks, and 126 focused tests passed.
• Full CLI suite with --maxWorkers=2 --testTimeout=30000 --printConsoleTrace --coverage: 10,526 passed, 16 skipped; all 504 files passed. Other workspace suites: MCP core 1,752 passed / 6 skipped; MCP server 83 passed; MCP test client 80 passed; MCP Cloudflare 433 passed. Combined: 12,874 passed, 22 skipped.
• Standard pnpm run test failed twice on the merged tree with SQLite disk-I/O errors across unrelated CLI tests and a timeout in the 1 MB ZIP test. The affected files passed in isolation; the complete CLI suite passed with reduced concurrency. The standard aggregate command has not passed on the merged tree.