Refactor the React OpenAPI admin framework to support fully customizable field rendering and UI composition. (#11)

# Summary

Refactor the React OpenAPI admin framework to support fully customizable field rendering and UI composition.

## Changes

### Admin UI Customization

* Added support for custom:

  * Dashboard component
  * Layout component
  * Login page component
* Introduced `AdminAppProps` and extended `Admin` configuration API.
* Renamed internal dashboard implementation to `DefaultDashboard`.

### Field Component Architecture

* Extracted field rendering into dedicated field components:

  * TextField
  * NumberField
  * BooleanField
  * DateField
  * EnumField
  * RelationField
  * ObjectField
  * FallbackField
  * DateRangeField
  * NumberRangeField
* Added `defaultFieldComponents` registry.
* Refactored `FormField` to resolve components dynamically from a component map instead of hardcoded field type handling.

### Resource Customization

* Added `FieldComponents` support across:

  * Admin
  * ResourceView
  * GenericForm
  * useResource
* Introduced wrapped `FormField` and `GenericForm` components generated from configured field overrides.

### Table Customization

* Added `EnhancedTableComponents`.
* Added support for custom cell renderers per field type.
* Enabled custom rendering for both desktop and mobile table layouts.

### Filter Improvements

* Exported `FilterAutocomplete`.
* Added support for custom date-range and number-range filter components.
* Added filter component extension points.
* Updated filter option label resolution to support `displayFormat`.

### Display Formatting

* Replaced `displayField` usage with `displayFormat`.
* Added template-based display rendering support through `resolveTemplate`.
* Improved relation display configuration handling.

### TypeScript Improvements

* Added TypeScript as a project dependency.
* Removed multiple `@ts-ignore` usages.
* Added strongly typed Axios wrapper methods with generic response support.
* Improved typing across hooks and component interfaces.

### OpenAPI Configuration Validation

* Added validation for enum fields without enum values.
* Added validation for relation resources missing `referenceOptions.enumOption`.
* Improved relation metadata propagation during schema parsing.

### Library Exports

* Exported:

  * Field component types
  * Override types
  * EnhancedTable
  * GenericForm
  * ResourceView
  * Field components and defaults
* Expanded public API surface for consumers extending the framework.

## Benefits

* Enables complete UI customization without modifying framework internals.
* Simplifies creation of custom field types and renderers.
* Improves type safety and developer experience.
* Provides consistent extension points for forms, tables, filters, and admin layouts.
* Makes the framework more suitable for reusable library distribution.

Reviewed-on: #11
Co-authored-by: Vishesh 'ironeagle' Bangotra <aetoskia@gmail.com>
Co-committed-by: Vishesh 'ironeagle' Bangotra <aetoskia@gmail.com>

react-openapi/components/fields/DefaultFieldComponents.ts

@@ -0,0 +1,40 @@
+import * as React from 'react';
+import { FieldComponents, FieldComponentProps } from '../../types/overrides';
+import TextFieldEntry from './TextField';
+import NumberField from './NumberField';
+import BooleanField from './BooleanField';
+import DateField from './DateField';
+import EnumField from './EnumField';
+import RelationField from './RelationField';
+import ImageUploadField from './ImageUploadField';
+import FallbackField from './FallbackField';
+import DateRangeField from './DateRangeField';
+import NumberRangeField from './NumberRangeField';
+
+const WrappedImageUploadField = (props: FieldComponentProps) =>
+  React.createElement(ImageUploadField, {
+    label: props.field.label,
+    value: props.value || '',
+    onUpload: async (file: File) => {
+      const url = await props.uploadFile?.(file);
+      if (url) props.onChange(url);
+    },
+    uploading: props.uploading,
+    baseUrl: props.baseUrl || '',
+    disabled: props.disabled,
+  });
+
+export const defaultFieldComponents: FieldComponents = {
+  string: TextFieldEntry,
+  markdown: TextFieldEntry,
+  number: NumberField,
+  boolean: BooleanField,
+  date: DateField,
+  datetime: DateField,
+  enum: EnumField,
+  image: WrappedImageUploadField,
+  relation: RelationField,
+  default: FallbackField,
+  dateRange: DateRangeField,
+  numberRange: NumberRangeField,
+};