refactor: migrate from legacy libraries

Finishes migration from dbflow to room keeping the schema,
Also includes the jackson to moshi migration to drop reflection,
drops the last remaining usages of rxjava, and finalizes
migration from mvp to mvvm.

app/build.gradle.kts

@@ -11,7 +11,6 @@ plugins {
   alias(libs.plugins.android.application)
   alias(libs.plugins.kotlinAndroid)
   alias(libs.plugins.kotlinParcelize)
-  alias(libs.plugins.kapt)
   alias(libs.plugins.ksp)
   alias(libs.plugins.protobuf)
   alias(libs.plugins.googleServices) apply false
@@ -98,6 +97,10 @@ android {
     buildConfigField("String", "BUILD_TIME", "\"${buildTime()}\"")
 
     testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+
+    ksp {
+      arg("room.schemaLocation", "$projectDir/schemas")
+    }
   }
 
   testOptions {
@@ -205,18 +208,6 @@ dependencies {
 
   implementation(projects.changelog)
 
-  testImplementation(libs.androidx.arch.core.testing)
-  testImplementation(libs.androidx.test.core)
-  testImplementation(libs.androidx.test.runner)
-  testImplementation(libs.androidx.test.junit)
-  testImplementation(libs.androidx.test.truth)
-  testImplementation(libs.bundles.androidx.test.espresso)
-  testImplementation(libs.truth)
-  testImplementation(libs.koin.test)
-  testImplementation(libs.kotlin.coroutines.test)
-  testImplementation(libs.mockk)
-  testImplementation(libs.robolectric)
-
   implementation(libs.androidx.annotation)
   implementation(libs.androidx.appcompat)
   implementation(libs.androidx.core.ktx)
@@ -233,23 +224,34 @@ dependencies {
   implementation(libs.androidx.legacy.support.v4)
   implementation(libs.androidx.legacy.support.v13)
   implementation(libs.bundles.coroutines)
+  implementation(libs.bundles.androidx.room)
   implementation(libs.bundles.coil)
   implementation(libs.bundles.koin)
   implementation(libs.google.material)
   implementation(libs.google.protobuf.javalite)
+  implementation(libs.squareup.moshi.lib)
   implementation(libs.squareup.okio)
+  implementation(libs.squareup.okhttp)
   implementation(libs.timber)
 
-  implementation(libs.bundles.dbflow)
-  implementation(libs.bundles.jackson)
-  implementation(libs.kotlin.stdlib)
-  implementation(libs.kotlin.reflect)
-  implementation(libs.rxandroid)
-  implementation(libs.rxjava)
-  implementation(libs.rxkotlin)
-  implementation(libs.rxrelay)
+  ksp(libs.androidx.room.compiler)
+  ksp(libs.squareup.moshi.codegen)
 
-  kapt(libs.dbflow.processor)
+  testImplementation(libs.androidx.arch.core.testing)
+  testImplementation(libs.androidx.room.testing)
+  testImplementation(libs.androidx.test.core)
+  testImplementation(libs.androidx.test.runner)
+  testImplementation(libs.androidx.test.junit)
+  testImplementation(libs.androidx.test.truth)
+  testImplementation(libs.bundles.androidx.test.espresso)
+  testImplementation(libs.androidx.paging.common.ktx)
+  testImplementation(libs.androidx.paging.testing)
+  testImplementation(libs.turbine)
+  testImplementation(libs.truth)
+  testImplementation(libs.koin.test)
+  testImplementation(libs.kotlin.coroutines.test)
+  testImplementation(libs.mockk)
+  testImplementation(libs.robolectric)
 
   debugImplementation(libs.squareup.leakcanary)
   debugImplementation(libs.androidx.fragment.testing)
@@ -365,7 +367,8 @@ tasks {
     doLast {
       if (!project.file("google-services.json").exists()) {
         throw GradleException(
-          "You need a google-services.json file to run this project. Please refer to the CONTRIBUTING.md file for details."
+          "You need a google-services.json file to run this project." +
+            " Please refer to the CONTRIBUTING.md file for details."
         )
       }
     }
@@ -379,12 +382,6 @@ tasks {
   }
 }
 
-kotlin {
-  sourceSets.all {
-    languageSettings.enableLanguageFeature("ExplicitBackingFields")
-  }
-}
-
 configurations.all {
   resolutionStrategy {
     force("com.google.code.findbugs:jsr305:3.0.2")