fix(docs): update calendar finance_calendar code examples and add mis…

[JetSquirrel]

• Replace outdated per-category SDK calls (e.g. dividend_calendar) with the unified finance_calendar method across all 7 calendar types
• Add missing zh-CN / zh-HK translations for meeting_calendar and merge_calendar (4 new files)
• Add CliCommand blocks, Response Example, and Schemas sections to meeting/merge docs for parity with other calendar pages
• Fix misleading response examples: macro calendar no longer shows stock-specific data, split calendar response matches HK market request, earnings count corrected, dates unified to match request params

Related issue: #1109