feat: Marine metric/imperial length units

Author: DadiBit

lib/src/main/kotlin/com/openmeteo/api/Marine.kt

@@ -5,6 +5,7 @@ import com.openmeteo.api.common.Options
 import com.openmeteo.api.common.http.Endpoint
 import com.openmeteo.api.common.time.Date
 import com.openmeteo.api.common.time.Timezone
+import com.openmeteo.api.common.units.LengthUnit
 import com.openmeteo.api.common.units.Unit
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
@@ -32,8 +33,10 @@ object Marine : Endpoint(
         override val pastDays: Int? = null,
         override val timezone: Timezone? = null,
         override val cellSelection: CellSelection? = null,
+        @SerialName("length_unit")
+        override val lengthUnit: LengthUnit? = null,
     ) : Q.Coordinate, Q.Daily, Q.Hourly, Q.TimeFormat, Q.Timezone, Q.PastDays,
-        Q.DateRange, Q.CellSelection
+        Q.DateRange, Q.CellSelection, Q.LengthUnit
 
     @Serializable
     open class Response(

lib/src/main/kotlin/com/openmeteo/api/common/query/Query.kt

@@ -188,6 +188,16 @@ interface Query {
         val precipitationUnit: com.openmeteo.api.common.units.PrecipitationUnit?
     }
 
+    /**
+     * Query for resources that may include lengths
+     */
+    interface LengthUnit : Query {
+        /**
+         * The requested length unit
+         */
+        val lengthUnit: com.openmeteo.api.common.units.LengthUnit?
+    }
+
     /**
      * Query for resources that can use different data models.
      */

lib/src/main/kotlin/com/openmeteo/api/common/units/LengthUnit.kt

@@ -0,0 +1,10 @@
+package com.openmeteo.api.common.units
+
+import kotlinx.serialization.SerialName
+
+enum class LengthUnit {
+    @SerialName("metric")
+    Metric,
+    @SerialName("imperial")
+    Imperial,
+}

lib/src/main/kotlin/com/openmeteo/api/common/units/Unit.kt

@@ -36,7 +36,9 @@ enum class Unit(vararg val alias: @Contextual Any) {
     @SerialName("cm")
     Centimeters,
     @SerialName("m")
-    Meters,
+    Meters(LengthUnit.Metric),
+    @SerialName("ft")
+    Feet(LengthUnit.Imperial),
     @SerialName("W/m²")
     WattPerSquareMeter,
     @SerialName("μg/m³")