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

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

website/src/locales/en.json

@@ -41,6 +41,7 @@
         "distance_units": "Distance units",
         "metric": "Metric",
         "imperial": "Imperial",
+        "nautical": "Nautical",
         "velocity_units": "Velocity units",
         "temperature_units": "Temperature units",
         "celsius": "Celsius",
@@ -363,12 +364,15 @@
         "feet": "ft",
         "kilometers": "km",
         "miles": "mi",
+        "nautical_miles": "nm",
         "celsius": "°C",
         "fahrenheit": "°F",
         "kilometers_per_hour": "km/h",
         "miles_per_hour": "mph",
         "minutes_per_kilometer": "min/km",
         "minutes_per_mile": "min/mi",
+        "minutes_per_nautical_mile": "min/nm",
+        "knots": "kn",
         "heartrate": "bpm",
         "cadence": "rpm",
         "power": "W"