Add theme management functionality to the application

Implemented a theme management system allowing users to select and persist themes (default, light, dark) in the settings menu.

languages/active.en.toml

@@ -426,6 +426,10 @@ other = "Licenses from other products used in the program"
 hash = "sha1-ed3f0e507a5b4ed0649d7c768fe0d47413d839ba"
 other = "Language"
 
+[menuSettingsTheme]
+hash = "sha1-553c45f1b84a92b08dc1f088c13f924cde95765e"
+other = "Theme"
+
 [or]
 hash = "sha1-30bb0333ca1583110e4ced513b5d2455b86f529b"
 other = "or"
@@ -522,6 +526,18 @@ other = "Settings"
 hash = "sha1-f5b8ed88e9609963035d2235be0a79bbec619976"
 other = "Checking FFmpeg for serviceability..."
 
+[themesNameDark]
+hash = "sha1-bd16b234708a2515a9f2d0ca41fb11e7fe8a38a2"
+other = "Dark"
+
+[themesNameDefault]
+hash = "sha1-469631cb165dcbbfea9e747056c25fbccb28c481"
+other = "Default"
+
+[themesNameLight]
+hash = "sha1-8080010c5e7d7edf56e89a99d8a2422898417845"
+other = "Light"
+
 [titleDownloadLink]
 hash = "sha1-92df86371f6c3a06ca1e4754f113142776a32d49"
 other = "You can download it from here"

languages/active.kk.toml

@@ -426,6 +426,10 @@ other = "Бағдарламада пайдаланылатын басқа өні
 hash = "sha1-ed3f0e507a5b4ed0649d7c768fe0d47413d839ba"
 other = "Тіл"
 
+[menuSettingsTheme]
+hash = "sha1-553c45f1b84a92b08dc1f088c13f924cde95765e"
+other = "Тақырып"
+
 [or]
 hash = "sha1-30bb0333ca1583110e4ced513b5d2455b86f529b"
 other = "немесе"
@@ -522,6 +526,18 @@ other = "Параметрлер"
 hash = "sha1-f5b8ed88e9609963035d2235be0a79bbec619976"
 other = "FFmpeg функционалдығы тексерілуде..."
 
+[themesNameDark]
+hash = "sha1-bd16b234708a2515a9f2d0ca41fb11e7fe8a38a2"
+other = "Қараңғы тақырып"
+
+[themesNameDefault]
+hash = "sha1-469631cb165dcbbfea9e747056c25fbccb28c481"
+other = "Әдепкі бойынша"
+
+[themesNameLight]
+hash = "sha1-8080010c5e7d7edf56e89a99d8a2422898417845"
+other = "Жеңіл тақырып"
+
 [titleDownloadLink]
 hash = "sha1-92df86371f6c3a06ca1e4754f113142776a32d49"
 other = "Сіз оны осы жерден жүктей аласыз"

languages/active.ru.toml

@@ -105,6 +105,7 @@ languageSelectionHead = "Выберите язык"
 licenseLink = "Сведения о лицензии"
 licenseLinkOther = "Лицензии от других продуктов, которые используются в программе"
 menuSettingsLanguage = "Язык"
+menuSettingsTheme = "Тема"
 or = "или"
 parameterCheckbox = "Включить параметр"
 pathToFfmpeg = "Путь к FFmpeg:"
@@ -129,6 +130,9 @@ selectFFPathTitle = "Укажите путь к FFmpeg и к FFprobe"
 selectFormat = "Расширение файла:"
 settings = "Настройки"
 testFF = "Проверка FFmpeg на работоспособность..."
+themesNameDark = "Тёмная"
+themesNameDefault = "По умолчанию"
+themesNameLight = "Светлая"
 titleDownloadLink = "Скачать можно от сюда"
 total = "Всего"
 unzipRun = "Распаковывается..."