Adds battery state translations

Adds translations for the battery state of the outside sensor to both the English and Czech language files.

This change provides more descriptive and user-friendly information about the battery status.

custom_components/sws12500/strings.json

@@ -131,11 +131,18 @@
           "wnw": "WNW",
           "nw": "NW",
           "nnw": "NNW"
+        },
+        "outside_battery": {
+          "name": "Outside battery level",
+          "state": {
+            "normal": "OK",
+            "low": "Low",
+            "unknown": "Unknown / drained out"
+          }
         }
       }
     }
   },
-  "outside_battery": { "name": "Outside battery level" },
   "notify": {
     "added": {
       "title": "New sensors for SWS 12500 found.",

custom_components/sws12500/translations/cs.json

@@ -136,10 +136,17 @@
           "nw": "SZ",
           "nnw": "SSZ"
         }
+      },
+      "outside_battery": {
+        "name": "Stav nabití venkovní baterie",
+        "state": {
+          "low": "Nízká",
+          "normal": "Normální",
+          "unknown": "Neznámá / zcela vybitá"
+        }
       }
     }
   },
-  "outside_battery": { "name": "Vnější úroveň nabití baterie" },
   "notify": {
     "added": {
       "title": "Nalezeny nové senzory pro SWS 12500.",

custom_components/sws12500/translations/en.json

@@ -137,7 +137,14 @@
           "nnw": "NNW"
         }
       },
-      "outside_battery": { "name": "Outside battery level" }
+      "outside_battery": {
+        "name": "Outside battery level",
+        "state": {
+          "normal": "OK",
+          "low": "Low",
+          "unknown": "Unknown / drained out"
+        }
+      }
     }
   },
   "notify": {