Feature/streamline settings (#1614)

* Cleanup graphql setting mutation

* Validate values read from config

* Generate server-reference.conf files from ServerConfig

* Remove unnecessary enum value handling in config value update

Commit df0078b725 introduced the usage of config4k, which handles enums automatically. Thus, this handling is outdated and not needed anymore

* Generate gql SettingsType from ServerConfig

* Extract settings backup logic

* Generate settings backup files

* Move "group" arg to second position

To make it easier to detect and have it at the same position consistently for all settings.

* Remove setting generation from compilation

* Extract setting generation code into new module

* Extract pure setting generation code into new module

* Remove generated settings files from src tree

* Force each setting to set a default value

server/src/main/kotlin/suwayomi/tachidesk/opds/impl/FeedBuilderInternal.kt

@@ -27,7 +27,7 @@ class FeedBuilderInternal(
     private val isSearchFeed: Boolean = false,
 ) {
     private val opdsItemsPerPageBounded: Int
-        get() = serverConfig.opdsItemsPerPage.value.coerceIn(10, 5000)
+        get() = serverConfig.opdsItemsPerPage.value
 
     private val feedAuthor = OpdsAuthorXml("Suwayomi", "https://suwayomi.org/")
     private val feedGeneratedAt: String = OpdsDateUtil.formatCurrentInstantForOpds()