Add support for nautical units (#61) (#66)

* Add support for nautical units

* Make panel reactive to unit changes even after pushing down conversions into utility functions.

* Fix issue: km->mph conversion was not done right.

* Add support for nautical units to the Time dialog.

* Add support for nautical units to the embedding view and embedding playground.

* add missing parameter and rename

* "npx prettier" pass on the files changed in this PR

Does not include changes to `website/src/lib/db.ts`, because there would otherwise be lots of unrelated formatting changes

* Change elevation unit to meters for 'nautical' distances.

* hide elevation decimals

---------

Co-authored-by: bdbkun <1308709+mbof@users.noreply.github.com>
Co-authored-by: vcoppe <vianney.coppe@gmail.com>

website/src/lib/components/toolbar/tools/Time.svelte

@@ -10,7 +10,8 @@
 	import {
 		distancePerHourToSecondsPerDistance,
 		getConvertedVelocity,
-		milesToKilometers
+		milesToKilometers,
+		nauticalMilesToKilometers
 	} from '$lib/units';
 	import { CalendarDate, type DateValue } from '@internationalized/date';
 	import { CalendarClock, CirclePlay, CircleStop, CircleX, Timer, Zap } from 'lucide-svelte';
@@ -129,6 +130,8 @@
 		}
 		if ($distanceUnits === 'imperial') {
 			speedValue = milesToKilometers(speedValue);
+		} else if ($distanceUnits === 'nautical') {
+			speedValue = nauticalMilesToKilometers(speedValue);
 		}
 		return speedValue;
 	}
@@ -190,8 +193,10 @@
 						<span class="text-sm shrink-0">
 							{#if $distanceUnits === 'imperial'}
 								{$_('units.miles_per_hour')}
-							{:else}
+							{:else if $distanceUnits === 'metric'}
 								{$_('units.kilometers_per_hour')}
+							{:else if $distanceUnits === 'nautical'}
+								{$_('units.knots')}
 							{/if}
 						</span>
 					{:else}
@@ -204,8 +209,10 @@
 						<span class="text-sm shrink-0">
 							{#if $distanceUnits === 'imperial'}
 								{$_('units.minutes_per_mile')}
-							{:else}
+							{:else if $distanceUnits === 'metric'}
 								{$_('units.minutes_per_kilometer')}
+							{:else if $distanceUnits === 'nautical'}
+								{$_('units.minutes_per_nautical_mile')}
 							{/if}
 						</span>
 					{/if}