Remove dependency injection from core module and data module from presentation-widget module

Includes side effects:
- No longer need to restart app for user agent string change to take effect
- parseAs extension function requires a Json instance in the calling context, which doesn't necessarily need to be the default one provided by Injekt

(cherry picked from commit 93523ef50b80ef294866bfb0da54e236cdf2d9f6)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateChecker.kt
#	app/src/main/java/eu/kanade/tachiyomi/extension/api/ExtensionGithubApi.kt
#	core/src/main/java/eu/kanade/tachiyomi/network/NetworkHelper.kt
#	core/src/main/java/eu/kanade/tachiyomi/network/OkHttpExtensions.kt
#	domain/build.gradle.kts
#	source-api/build.gradle.kts

source-api/build.gradle.kts

@@ -11,23 +11,17 @@ android {
     defaultConfig {
         consumerProguardFile("consumer-proguard.pro")
     }
-
 }
 
 dependencies {
-
     implementation(project(":core"))
 
     api(kotlinx.serialization.json)
-
+    api(libs.injekt.core)
     api(libs.rxjava)
-
     api(libs.preferencektx)
-
     api(libs.jsoup)
 
-    implementation(androidx.corektx)
-
     // SY -->
     implementation(project(":i18n"))
     implementation(kotlinx.reflect)