Add Pico and Femto prefixes to meter (#1294)

Fix #1270

Author: lamarch

Common/UnitDefinitions/Length.json

@@ -14,7 +14,7 @@
       },
       "FromUnitToBaseFunc": "{x}",
       "FromBaseToUnitFunc": "{x}",
-      "Prefixes": [ "Nano", "Micro", "Milli", "Centi", "Deci", "Deca", "Hecto", "Kilo", "Mega" ],
+      "Prefixes": [ "Femto", "Pico", "Nano", "Micro", "Milli", "Centi", "Deci", "Deca", "Hecto", "Kilo", "Mega" ],
       "Localization": [
         {
           "Culture": "en-US",

Common/UnitEnumValues.g.json

@@ -691,7 +691,9 @@
     "UsSurveyFoot": 35,
     "Yard": 36,
     "Megameter": 41,
-    "Kilofoot": 45
+    "Kilofoot": 45,
+    "Femtometer": 48,
+    "Picometer": 43
   },
   "Level": {
     "Decibel": 1,

UnitsNet.NanoFramework/GeneratedCode/Quantities/Length.g.cs

@@ -21,6 +21,7 @@ public class LengthTests : LengthTestsBase
         protected override double DtpPicasInOneMeter => 236.22047244;
         protected override double DtpPointsInOneMeter => 2834.6456693;
 
+        protected override double FemtometersInOneMeter => 1E+15;
         protected override double FeetInOneMeter => 3.28083989501;
 
         protected override double HectometersInOneMeter => 1E-2;
@@ -50,6 +51,7 @@ public class LengthTests : LengthTestsBase
 
         protected override double FathomsInOneMeter => 0.546806649;
 
+        protected override double PicometersInOneMeter => 1E+12;
         protected override double PrinterPicasInOneMeter => 237.10630158;
         protected override double PrinterPointsInOneMeter => 2845.2755906;