refactor(server): split gtfs into its own module

server/gtfs/build.gradle.kts

@@ -0,0 +1,20 @@
+plugins {
+    alias(libs.plugins.kotlinJvm)
+    alias(libs.plugins.kotlinSerialization)
+}
+
+kotlin {
+    compilerOptions {
+        freeCompilerArgs.add("-opt-in=kotlin.time.ExperimentalTime")
+        freeCompilerArgs.add("-Xexplicit-backing-fields")
+    }
+}
+
+dependencies {
+    implementation(projects.shared)
+    implementation(libs.kotlinx.serialization.csv)
+    implementation(libs.kotlinx.datetime)
+    implementation(libs.ktor.client.contentnegotiation)
+    implementation(libs.ktor.client.core)
+    implementation(libs.ktor.client.okhttp)
+}