Function epochToWallDate

epochToWallDate(
    epoch: number,
    timezone: TimeZoneId,
    timeUnit?: UnixTimeUnit,
): Date
Convert an epoch in the given unit to a JS Date carrying the same local clock in timezone (a "floating" Date). The returned Date's UTC fields (getUTC*) reflect the local time in timezone at that instant; this shape is convenient for UI round-trips with wallTimeToEpoch.
Parameters
- epoch: number
  Epoch timestamp in the provided unit.
- timezone: TimeZoneId
  IANA time zone identifier (branded TimeZoneId). Throws RangeError on invalid zone.
- timeUnit: UnixTimeUnit = DEFAULT_TIME_UNIT
  'ms' (default) for milliseconds or 's' for integer seconds. Throws RangeError on invalid value.
Returns Date
A "floating" Date whose UTC fields equal the local wall-clock Y/M/D/H/M/S in timezone at the provided instant. This is suitable for round- tripping with wallTimeToEpoch.
Remarks
In 's' mode, the instant is interpreted as integer seconds since epoch. DST is handled by Luxon at the instant being converted.
Example
```
const tz = RRStack.asTimeZoneId('Europe/Paris');
const wall = epochToWallDate(Date.UTC(2024, 6, 20, 7, 0, 0), tz, 'ms');
// wall.getUTCHours() equals the Paris local hour at that instant.
const back = wallTimeToEpoch(wall, tz, 'ms'); // round-trip
```
- Defined in src/time/index.ts:258