Feature request: Render calendar in a selected time zone (events stored as UTC)

[sahilalad]

Title: Feature request: Render calendar in a selected time zone (events stored as UTC)

Summary
I store all event timestamps in UTC. The scheduler currently renders using the viewer’s device time zone. I need an option to render the entire calendar (grid, headers, event chips, tooltips) in a user-selected IANA time zone.

Current behavior

• Events are saved as UTC.
• UI renders times in the device/browser time zone.
• Users in different regions see different local times for the same event.

Expected behavior

• Provide a prop to control display time zone.
• When set, all calendar UI uses that zone.
• Creating or editing events still returns UTC to the app.

Proposed API (example)

<Scheduler
  events={events}            // ISO strings in UTC
  displayTimeZone="Asia/Dubai" // IANA TZ for rendering only
  onEventCreate={(e) => saveAsUTC(e)} // library hands back Date; app persists UTC
/>

Details:

• displayTimeZone?: string accepts an IANA name (e.g., "America/Toronto").
• Internal conversions use Intl.DateTimeFormat or a lightweight TZ lib.
• If not provided, fall back to device time zone (current behavior).

Why this matters

• Admins schedule global sessions but want a consistent view per chosen region.
• Avoids confusion across DST changes and cross-region teams.
• Pre-converting data outside the component is brittle and does not change headers/slots.

Alternatives considered

• Manually converting event start/end before passing to the component.

  • Problem: headers, slot labels, and drag/resize handles still use device TZ.

Environment

• react-scheduler: [0.3.1]
• React: [18.3.1]
• Browser/OS: [e.g., Chrome 139 on Windows 10]
• Device TZ: [e.g., America/Toronto]
• Desired display TZ: [e.g., Asia/Dubai]

Additional context
Happy to provide a minimal reproduction if needed. If a PR is welcome, confirm preferred approach for time zone handling and any constraints.