feat: Update the Czech translation (#8133)

* Update the Czech translation of `addPeople`

* Update the Czech translation of `calendarSync`

* Update the Czech translation of `chat`

* Add the Czech translation of `chromeExtensionBanner`

* Update the Czech translation of `connectingOverlay` and `connection`

* Update the Czech translation of `connectionindicator`

* Update the Czech translation of `deepLinking`

* Update various strings in the Czech translation

* Update various strings in the Czech translation

* Fix a trailing comma that broke JSON

* Sort keys in main-cs.json to deduplicate the translation and make diffs from main.json more readable

* Add several missing strings in the Czech translation

* Add several missing strings in the Czech translation, mainly lobby mode

* Add several missing strings in the Czech translation, mainly `prejoin`

* Add the missing Czech translation of `recording` and `security`

* Update various strings in the Czech translation

* Add the missing Czech translation of `accessibilityLabel`

* Add the missing Czech translation of `toolbar`

* Update various strings in the Czech translation

* Update various strings in the Czech translation

* Various edits of the Czech translation and a spell check

* Add missing language names in the Czech translation

lang/languages-cs.json

 {
     "en": "Angličtina",
-    "af": "",
-    "az": "",
+    "af": "Afrikánština",
+    "ar": "Arabština",
+    "az": "Ázerbájdžánština",
     "bg": "Bulharština",
-    "cs": "",
+    "ca": "Katalánština",
+    "cs": "Čeština",
+    "da": "Dánština",
     "de": "Němčina",
-    "el": "",
+    "el": "Řečtina",
+    "enGB": "Angličtina (Spojené království)",
     "eo": "Esperanto",
     "es": "Španělština",
+    "esUS": "Španělština (Latinská Amerika)",
+    "et": "Estonština",
+    "eu": "Baskičtina",
+    "fi": "Finština",
     "fr": "Francouština",
+    "frCA": "Francouzština (Kanada)",
+    "he": "Hebrejština",
+    "mr":"Maráthština",
+    "hr": "Chorvatština",
+    "hu": "Maďarština",
     "hy": "Arménština",
+    "id": "Indonéština",
     "it": "Italština",
-    "ja": "",
-    "ko": "",
+    "ja": "Japonština",
+    "kab": "Kabylština",
+    "ko": "Korejština",
+    "lt": "Litevština",
+    "nl": "Nizozemština",
     "nb": "Norština Bokmal",
     "oc": "Okcitánština",
     "pl": "Polština",
-    "ptBR": "Portugalština (Brazilská)",
+    "ptBR": "Portugalština (Brazílie)",
     "ru": "Ruština",
+    "ro": "Rumunština",
+    "sc": "Sardinština",
     "sk": "Slovenština",
     "sl": "Slovinština",
+    "sr": "Srbština",
     "sv": "Švédština",
+    "th": "Thajština",
     "tr": "Turečtina",
-    "vi": "",
-    "zhCN": "Čínština (Čína)"
-}
+    "uk": "Ukrajinština",
+    "vi": "Vietnamština",
+    "zhCN": "Čínština (Čína)",
+    "zhTW": "Čínština (Taiwan)"
+}