refactor: switch from metro to koin

Honestly metro looks too overcomplicated and I still don't know how to
use it properly. Switching to koin for now as I'm more comfortable with
it.

core/build.gradle.kts

@@ -2,9 +2,9 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
     alias(libs.plugins.androidLibrary)
+    alias(libs.plugins.koinCompiler)
     alias(libs.plugins.kotlinMultiplatform)
     alias(libs.plugins.kotlinSerialization)
-    alias(libs.plugins.metro)
     alias(libs.plugins.sqldelight)
 }
 
@@ -23,6 +23,9 @@ kotlin {
             implementation(libs.ktor.client.websockets)
             implementation(libs.ktor.serialization.kotlinx.json)
 
+            implementation(project.dependencies.platform(libs.koin.bom))
+            implementation(libs.koin.core)
+
             implementation(libs.kermit)
             implementation(libs.settings)
         }