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

app/build.gradle.kts

@@ -283,6 +283,7 @@ tasks {
     // See https://kotlinlang.org/docs/reference/experimental.html#experimental-status-of-experimental-api(-markers)
     withType<KotlinCompile> {
         kotlinOptions.freeCompilerArgs += listOf(
+            "-Xcontext-receivers",
             "-opt-in=coil.annotation.ExperimentalCoilApi",
             "-opt-in=com.google.accompanist.permissions.ExperimentalPermissionsApi",
             "-opt-in=androidx.compose.foundation.layout.ExperimentalLayoutApi",