added basic edit account

- add link in to edit a user in users.html
- change to AccountController
  - update getCreateAccount for change to AccountForm
  - add getEditAccount
- add edit.html
- change to Mapping.kt
  - update AccountForm toAccountRequest to throw exception if password null
  - add Account Response toAccountForm
- change password and passwordConfirm to be null in AccountForm
- add PasswordException
- add getAccount to AccountRegistryService
- add accountRegistryAccount to WebClientCalls.kt

src/main/kotlin/ltd/hlaeja/form/AccountForm.kt

@@ -2,8 +2,8 @@ package ltd.hlaeja.form
 
 data class AccountForm(
     val username: String,
-    val password: CharSequence,
-    val passwordConfirm: CharSequence,
     val role: String,
     val enabled: Boolean = false,
+    val password: CharSequence? = null,
+    val passwordConfirm: CharSequence? = null,
 )