feat: add support for `equalTo` and `proxy`

[simonguo]

equalTo(fieldName: string, errorMessage?: string)

Check if the value is equal to the value of another field.

SchemaModel({
  password: StringType().isRequired(),
  confirmPassword: StringType().equalTo('password')
});

proxy(fieldNames: string[], options?: { checkIfValueExists?: boolean })

After the field verification passes, proxy verification of other fields.

• fieldNames: The field name to be proxied.
• options.checkIfValueExists: When the value of other fields exists, the verification is performed (default: false)

SchemaModel({
  password: StringType().isRequired().proxy(['confirmPassword']),
  confirmPassword: StringType().equalTo('password')
});

[forispeti]

This change causes issues with rsuite's form. The schema model is updated here but not in the checking functions of the form(referring to Schema.ts line 13, spec to $spec)

[simonguo]

This change causes issues with rsuite's form. The schema model is updated here but not in the checking functions of the form(referring to Schema.ts line 13, spec to $spec)

Thanks, rsuite will also be released after the update today