Introduce Built-in Helper for Duration Formatting in Handlebars Charts

What is the problem or goal the end user is trying to solve or accomplish?

Users often need to convert time durations (e.g., 43000817 → 11:56:40) into a human-readable format directly in Handlebars templates — especially when visualizing performance metrics or cumulative execution times.

How are they solving it currently?

They must pre-format durations in SQL using arithmetic and string concatenation (or in dbt models) before the data reaches Preset. This increases query complexity and makes formatting logic harder to reuse across charts.

What is the recommended solution by the Customer?

Add a native helper such as:

{{formatDuration ms}}

This helper should convert a numeric duration (in milliseconds) into HH:MM:SS or a customizable format (e.g., DD:HH:MM:SS), rounding values appropriately.