feat: Add announcements API

src/main/kotlin/app/revanced/api/backend/Backend.kt

@@ -2,6 +2,7 @@ package app.revanced.api.backend
 
 import io.ktor.client.*
 import io.ktor.client.engine.okhttp.*
+import kotlinx.datetime.LocalDateTime
 import kotlinx.serialization.Serializable
 
 /**
@@ -89,7 +90,7 @@ abstract class Backend(
             class BackendRelease(
                 val tag: String,
                 val releaseNote: String,
-                val createdAt: String,
+                val createdAt: LocalDateTime,
                 val assets: Set<BackendAsset>
             ) {
                 /**

src/main/kotlin/app/revanced/api/backend/github/GitHubBackend.kt

@@ -26,6 +26,8 @@ import kotlinx.coroutines.*
 import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.JsonNamingStrategy
+import org.koin.dsl.bind
+import org.koin.dsl.module
 
 @OptIn(ExperimentalSerializationApi::class)
 class GitHubBackend(token: String? = null) : Backend({

src/main/kotlin/app/revanced/api/backend/github/api/ResponseSchema.kt

@@ -1,5 +1,6 @@
 package app.revanced.api.backend.github.api
 
+import kotlinx.datetime.LocalDateTime
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 
@@ -40,7 +41,7 @@ class Response {
             class GitHubRelease(
                 val tagName: String,
                 val assets: Set<GitHubAsset>,
-                val createdAt: String,
+                val createdAt: LocalDateTime,
                 val body: String
             ) {
                 @Serializable