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/configuration/SecurityConfiguration.kt

@@ -35,7 +35,7 @@ class SecurityConfiguration {
         .anyExchange().authenticated()
 
     private fun AuthorizeExchangeSpec.adminPaths(): AuthorizeExchangeSpec.Access = pathMatchers(
-        "/account/**"
+        "/account/**",
     )
 
     private fun AuthorizeExchangeSpec.publicPaths(): AuthorizeExchangeSpec.Access = pathMatchers(