added basic create account

- add link in to creat in users.html
- AccountController
  - add getCreateAccount
  - add postCreateAccount
- add create.html
- add AccountForm to Account Request in Mapping.kt
- add AccountForm
- add addAccount to AccountRegistryService
- add accountRegistryCreate to WebClientCalls.kt
- add UsernameDuplicateException
- add AccountRegistryException
- add HlaejaException

src/main/kotlin/ltd/hlaeja/service/AccountRegistryService.kt

@@ -1,11 +1,13 @@
 package ltd.hlaeja.service
 
 import io.github.oshai.kotlinlogging.KotlinLogging
+import ltd.hlaeja.exception.AccountRegistryException
 import ltd.hlaeja.library.accountRegistry.Account
 import ltd.hlaeja.library.accountRegistry.Authentication
 import ltd.hlaeja.property.AccountRegistryProperty
 import ltd.hlaeja.util.accountRegistryAccounts
 import ltd.hlaeja.util.accountRegistryAuthenticate
+import ltd.hlaeja.util.accountRegistryCreate
 import org.springframework.http.HttpStatus.BAD_REQUEST
 import org.springframework.security.authentication.AuthenticationServiceException
 import org.springframework.security.core.AuthenticationException
@@ -54,4 +56,14 @@ class AccountRegistryService(
         size: Int,
     ): Flux<Account.Response> = webClient.accountRegistryAccounts(page, size, property)
         .onErrorResume { error -> Flux.error(ResponseStatusException(BAD_REQUEST, error.message, error)) }
+
+    fun addAccount(
+        request: Account.Request,
+    ): Mono<Account.Response> = webClient.accountRegistryCreate(request, property)
+        .onErrorResume { error ->
+            when (error) {
+                is AccountRegistryException -> Mono.error(error)
+                else -> Mono.error(ResponseStatusException(BAD_REQUEST, error.message))
+            }
+        }
 }