Working on Skills and some fixes

- Added Skills to character sheet
- Added migration to old skills
- Added icon on skills
- Added actor.isNpc
- Money out of system

system/lang/fr-fr.json

@@ -96,7 +96,7 @@
             "void": "Vide"
         },
         "sheets": {
-            "narrative": "Mode Narratif",
+            "narrative": "Narratif",
             "experience": "Expérience",
             "family": "Famille",
             "region": "Région",