Cleanup and rework build logic (#3113)

data/build.gradle.kts

@@ -1,17 +1,14 @@
 plugins {
-    id("mihon.library")
-    kotlin("android")
-    kotlin("plugin.serialization")
+    alias(mihonx.plugins.android.library)
+    alias(mihonx.plugins.spotless)
+
+    alias(libs.plugins.kotlin.serialization)
     alias(libs.plugins.sqldelight)
 }
 
 android {
     namespace = "tachiyomi.data"
 
-    defaultConfig {
-        consumerProguardFiles("consumer-rules.pro")
-    }
-
     sqldelight {
         databases {
             create("Database") {