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/embedding/EmbeddingPlayground.svelte

@@ -221,6 +221,10 @@
 							<RadioGroup.Item value="imperial" id="imperial" />
 							<Label for="imperial">{$_('menu.imperial')}</Label>
 						</div>
+						<div class="flex items-center space-x-2">
+							<RadioGroup.Item value="nautical" id="nautical" />
+							<Label for="nautical">{$_('menu.nautical')}</Label>
+						</div>
 					</RadioGroup.Root>
 				</Label>
 				<Label class="flex flex-col items-start gap-2">