Fill in the Korean translation gaps left by the AI Purify/auto-clean-stop merges

ko.json (PR #283) was written against an older en.json and never picked up
the ten keys two later PRs added: the AI Purify sensing entities
(switch.periodic_air_sensing, switch.periodic_sensing_skip_status,
number.sensing_interval, select.sensing_mode + its three states,
time.sensing_skip_start/end) and button.auto_clean_stop. Merging main
into this branch surfaced the gap via
test_every_language_mirrors_the_english_catalog.

Translated the missing entries, matching the terminology and phrasing
ko.json already uses for adjacent keys (e.g. periodic_air_sensing's
existing binary_sensor entry, auto_clean's "자동 청소"), and kept "AI
Purify" as the untranslated brand name the same way cs/es/it/nl do.
ko.json's topology now matches en.json's exactly; full suite (1213
tests), ruff, and ty all pass.

custom_components/localthings/translations/ko.json

@@ -117,6 +117,9 @@
       "diagnosis_start": {
         "name": "진단 시작"
       },
+      "auto_clean_stop": {
+        "name": "자동 청소 정지"
+      },
       "pause": {
         "name": "일시정지"
       },
@@ -191,6 +194,9 @@
       "oven_setpoint": {
         "name": "설정 온도"
       },
+      "sensing_interval": {
+        "name": "AI Purify 간격"
+      },
       "setpoint": {
         "name": "설정값"
       },
@@ -494,6 +500,14 @@
       "rinse_cycles": {
         "name": "헹굼 횟수"
       },
+      "sensing_mode": {
+        "name": "AI Purify 동작",
+        "state": {
+          "off": "감지만",
+          "airpurify": "자동 청소",
+          "alarm": "알림 받기"
+        }
+      },
       "softener_concentration": {
         "name": "섬유유연제 농축도",
         "state": {
@@ -1030,6 +1044,12 @@
       "display": {
         "name": "디스플레이"
       },
+      "periodic_air_sensing": {
+        "name": "AI Purify"
+      },
+      "periodic_sensing_skip_status": {
+        "name": "AI Purify 감지 건너뛰기"
+      },
       "pet_filter_activation": {
         "name": "펫 필터 작동"
       },
@@ -1199,6 +1219,12 @@
       },
       "night_start": {
         "name": "야간 조명 시작"
+      },
+      "sensing_skip_end": {
+        "name": "AI Purify 감지 건너뛰기 종료"
+      },
+      "sensing_skip_start": {
+        "name": "AI Purify 감지 건너뛰기 시작"
       }
     },
     "water_heater": {