Get Account

- add AccountController
- add AccountEntity toAccountResponse in Mapping.kt
- add AccountService
- add AccountRepository
- add AccountEntity

src/main/kotlin/ltd/hlaeja/util/Mapping.kt

@@ -0,0 +1,15 @@
+package ltd.hlaeja.util
+
+import ltd.hlaeja.entity.AccountEntity
+import ltd.hlaeja.library.accountRegistry.Account
+import org.springframework.http.HttpStatus.EXPECTATION_FAILED
+import org.springframework.web.server.ResponseStatusException
+
+fun AccountEntity.toAccountResponse(): Account.Response = Account.Response(
+    id ?: throw ResponseStatusException(EXPECTATION_FAILED),
+    updatedAt,
+    enabled,
+    username,
+    roles.split(","),
+)
+