fix(translations): mirror the new button string into every catalog

test_every_language_mirrors_the_english_catalog is right to fail on this: a key
present only in English falls back silently at runtime, which reads as a
half-finished translation rather than a missing one.

Also fills in the same key for ko.json, which the original fix predates:
Korean's translation catalog was added after this branch was cut and never
picked up filter_time_reset either.

custom_components/localthings/translations/cs.json

@@ -120,6 +120,9 @@
       "auto_clean_stop": {
         "name": "Zastavit samočištění"
       },
+      "filter_time_reset": {
+        "name": "Vynulovat počítadlo filtru"
+      },
       "pause": {
         "name": "Pozastavit"
       },

custom_components/localthings/translations/es.json

@@ -242,6 +242,9 @@
       "auto_clean_stop": {
         "name": "Detener la autolimpieza"
       },
+      "filter_time_reset": {
+        "name": "Restablecer el contador del filtro"
+      },
       "pause": {
         "name": "Pausar"
       },

custom_components/localthings/translations/it.json

@@ -120,6 +120,9 @@
       "auto_clean_stop": {
         "name": "Arresta autopulizia"
       },
+      "filter_time_reset": {
+        "name": "Azzera il contatore del filtro"
+      },
       "pause": {
         "name": "Pausa"
       },

custom_components/localthings/translations/ko.json

@@ -120,6 +120,9 @@
       "auto_clean_stop": {
         "name": "자동 청소 정지"
       },
+      "filter_time_reset": {
+        "name": "필터 사용 시간 초기화"
+      },
       "pause": {
         "name": "일시정지"
       },

custom_components/localthings/translations/nl.json

@@ -120,6 +120,9 @@
       "auto_clean_stop": {
         "name": "Zelfreiniging stoppen"
       },
+      "filter_time_reset": {
+        "name": "Filterteller op nul zetten"
+      },
       "pause": {
         "name": "Pauzeren"
       },