Proper i18n date/time handling (#17858)

* install date-fns-tz

* add date locale hook

* refactor formatUnixTimestampToDateTime

Use date-fns style instead of using strftime. This requires changing the i18n keys to the way date-fns represents dates (eg: "MMM d, h:mm:ss aaa"  instead of "%b %-d, %H:%M"

* refactor calendar to use new hook

* fix useFormattedTimestamp to use new formatUnixTimestampToDateTime date_format

* change i18n keys to new format

* fix timeline

* fix review

* fix explore

* fix metrics

* fix notifications

* fix face library

* clean up

web/package-lock.json

@@ -38,6 +38,7 @@
         "cmdk": "^1.0.0",
         "copy-to-clipboard": "^3.3.3",
         "date-fns": "^3.6.0",
+        "date-fns-tz": "^3.2.0",
         "embla-carousel-react": "^8.2.0",
         "framer-motion": "^11.5.4",
         "hls.js": "^1.5.20",
@@ -4399,6 +4400,15 @@
         "url": "https://github.com/sponsors/kossnocorp"
       }
     },
+    "node_modules/date-fns-tz": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/date-fns-tz/-/date-fns-tz-3.2.0.tgz",
+      "integrity": "sha512-sg8HqoTEulcbbbVXeg84u5UnlsQa8GS5QXMqjjYIhS4abEVVKIUwe0/l/UhrZdKaL/W5eWZNlbTeEIiOXTcsBQ==",
+      "license": "MIT",
+      "peerDependencies": {
+        "date-fns": "^3.0.0 || ^4.0.0"
+      }
+    },
     "node_modules/debug": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.0.tgz",