refactor: Migrate from monolithic to modular architecture

- Restructure project into domain-specific modules (core, masterdata, members, horses, events, infrastructure)
- Create shared client components in common-ui module
- Implement CI/CD workflows with GitHub Actions
- Consolidate documentation in docs directory
- Remove deprecated modules and documentation files
- Add cleanup and migration scripts for transition
- Update README with new project structure and setup instructions

masterdata/masterdata-api/build.gradle.kts

@@ -0,0 +1,36 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    alias(libs.plugins.kotlin.serialization)
+    alias(libs.plugins.ktor)
+    application
+}
+
+application {
+    mainClass.set("at.mocode.masterdata.api.ApplicationKt")
+}
+
+dependencies {
+    implementation(projects.platform.platformDependencies)
+
+    implementation(projects.masterdata.masterdataDomain)
+    implementation(projects.masterdata.masterdataApplication)
+    implementation(projects.core.coreDomain)
+    implementation(projects.core.coreUtils)
+
+    // Spring dependencies
+    implementation("org.springframework:spring-web")
+    implementation("org.springdoc:springdoc-openapi-starter-common")
+
+    // Ktor Server
+    implementation(libs.ktor.server.core)
+    implementation(libs.ktor.server.netty)
+    implementation(libs.ktor.server.contentNegotiation)
+    implementation(libs.ktor.server.serializationKotlinxJson)
+    implementation(libs.ktor.server.statusPages)
+    implementation(libs.ktor.server.auth)
+    implementation(libs.ktor.server.authJwt)
+
+    testImplementation(projects.platform.platformTesting)
+    testImplementation(libs.ktor.server.tests)
+}