feat(Form): improve form control and input validation trigger (#487)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

src/runtime/types/form.d.ts

@@ -4,10 +4,18 @@ export interface FormError {
 }
 
 export interface Form<T> {
-  validate(): Promise<T>
+  validate(path?: string, opts: { silent?: boolean } = { silent: false }): Promise<T>
+  clear(path?: string): void
+  errors: Ref<FormError[]>
+  setErrors(errs: FormError[], path?: string): void
+  getErrors(path?: string): FormError[]
 }
 
+export type FormSubmitEvent<T> = SubmitEvent & { data: T }
+
+export type FormEventType = 'blur' | 'input' | 'change' | 'submit'
+
 export interface FormEvent {
-  type: 'blur' // | 'change' | 'focus'
+  type: FormEventType
   path: string
 }