feat(form-core): Add ability addErrors during submission

docs/reference/core/Validation.md

@@ -114,3 +114,17 @@ interface ValidatorAsyncOptions extends ValidatorOptions {
 |--------------------|--------------------------------------------------------------|-------------|
 | `debounceMs`       | The debounce time in milliseconds.                           | `undefined` |
 | `accumulateErrors` | Accumulates the errors instead of stopping at the first one. | `false`     |
+
+## ErrorTransformers
+
+This is a collection of functions, that can be used to transform the error messages form a schema validation library to a format that is used by this library.
+
+```ts
+interface ErrorTransformers {
+  zod: (issues: ZodIssue[]) => Record<string, string>
+}
+```
+
+::: info
+Currently only `zod` is supported.
+:::

packages/form-core/src/FormLogic.ts

@@ -85,6 +85,7 @@ export type FormLogicOptions<
   /**
    * Callback for when the form is submitted
    * @param data The data at the time of submission
+   * @param addErrors A function to add errors to the form
    */
   onSubmit?: (
     data: TData,
@@ -536,6 +537,14 @@ export class FormLogic<
     try {
       await currentOptions.onSubmit(this._jsonData.peek(), (errors) => {
         for (const [path, error] of Object.entries(errors)) {
+          if(!path) {
+            this.setErrors({
+              async: error,
+              asyncErrorEvent: 'server',
+            })
+            continue
+          }
+
           const field = this.getFieldForPath(path as Paths<TData>)
           if (!field) {
             continue