feat(localization): Add Czech language support

This commit introduces Czech language support to the application.

- Added "Czech" to the `Language` enum in `Constants.kt`.
- Updated `getDisplayName`, `getDisplayCountryName`, `getLanguageCode`, and `getLanguageTag` functions in `Constants.kt` to include Czech localization.
- Added the Czech language string resource `lang_czech` to `languages.xml`.

Signed-off-by: CreativeCodeCat <wayne6324@gmail.com>

Author: CreativeCodeCat

app/src/main/java/com/github/droidworksstudio/mlauncher/data/Constants.kt

@@ -142,6 +142,7 @@ object Constants {
         System,
         Arabic,
         Dutch,
+        Czech,
         English,
         French,
         German,
@@ -164,6 +165,7 @@ object Constants {
                 System -> getLocalizedString(R.string.system_default)
                 Arabic -> getLocalizedString(R.string.lang_arabic)
                 Dutch -> getLocalizedString(R.string.lang_dutch)
+                Czech -> getLocalizedString(R.string.lang_czech)
                 English -> getLocalizedString(R.string.lang_english)
                 French -> getLocalizedString(R.string.lang_french)
                 German -> getLocalizedString(R.string.lang_german)
@@ -188,6 +190,7 @@ object Constants {
                 System -> getLocalizedString(R.string.system_default)
                 Arabic -> getLocalizedString(R.string.lang_arabic)
                 Dutch -> getLocalizedString(R.string.lang_dutch)
+                Czech -> getLocalizedString(R.string.lang_czech)
                 English -> getLocalizedString(R.string.lang_english)
                 French -> getLocalizedString(R.string.lang_french)
                 German -> getLocalizedString(R.string.lang_german)
@@ -216,6 +219,7 @@ object Constants {
                 System -> Locale.getDefault().language
                 Arabic -> "ar"
                 Dutch -> "nl"
+                Czech -> "cs"
                 English -> "en"
                 French -> "fr"
                 German -> "de"
@@ -243,6 +247,7 @@ object Constants {
                 System -> Locale.getDefault().toLanguageTag()
                 Arabic -> "ar-SA"
                 Dutch -> "nl-NL"
+                Czech -> "cs-Cz"
                 English -> "en-US"
                 French -> "fr-FR"
                 German -> "de-DE"

app/src/main/res/values/languages.xml

@@ -2,6 +2,7 @@
 <resources>
     <string name="lang_arabic">Arabic</string>
     <string name="lang_dutch">Dutch</string>
+    <string name="lang_czech">czech</string>
     <string name="lang_english">English</string>
     <string name="lang_french">French</string>
     <string name="lang_german">German</string>