feat(react-formio): add button molecule

packages/react-formio/src/molecules/button/Button.stories.tsx

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+import { Meta, StoryObj } from "@storybook/react";
+
+import { Icon } from "../../atoms/icon/Icon";
+import { Button, BUTTON_VARIANTS } from "./Button";
+
+/**
+ * Button component with a label and an onClick handler.
+ *
+ * ```ts
+ * import {Button} from "@tsed/react-formio/molecules/button/Button";
+ * ```
+ *
+ * ## Override Button
+ *
+ * This component is registered with the name `Button` and can be overridden with the following code:
+ *
+ * ```ts
+ * registerComponent("Button", MyCustomButtonComponent);
+ * ```
+ */
+export default {
+  title: "Button",
+  component: Button,
+  argTypes: {
+    onClick: { action: "clicked" },
+    variant: {
+      control: "select",
+      options: BUTTON_VARIANTS
+    },
+    disabled: {
+      control: "boolean"
+    }
+  },
+  parameters: {
+    children: "Text",
+    variant: "primary"
+  }
+} satisfies Meta<typeof Button>;
+
+type Story = StoryObj<typeof Button>;
+
+export const Usage: Story = {
+  args: {
+    children: "Text",
+    variant: "primary"
+  }
+};
+
+export const Variant: Story = {
+  args: {
+    children: "Text"
+  },
+  render(args) {
+    return (
+      <div className='flex flex-wrap gap-3'>
+        {BUTTON_VARIANTS.map((variant) => (
+          <div key={variant}>
+            <Button {...args} variant={variant as any}>
+              {variant}
+            </Button>
+          </div>
+        ))}
+      </div>
+    );
+  }
+};
+
+export const Disabled: Story = {
+  args: {
+    children: "Text",
+    disabled: true
+  },
+  render(args) {
+    return (
+      <div className='flex flex-wrap gap-3'>
+        {BUTTON_VARIANTS.map((variant) => (
+          <div key={variant}>
+            <Button {...args} variant={variant as any}>
+              {variant}
+            </Button>
+          </div>
+        ))}
+      </div>
+    );
+  }
+};
+
+export const WithIcon: Story = {
+  args: {
+    children: "Text"
+  },
+  render(args) {
+    return (
+      <div className='flex flex-wrap gap-3'>
+        {BUTTON_VARIANTS.map((variant) => (
+          <div key={variant}>
+            <Button {...args} variant={variant as any}>
+              <Icon name='save' />
+              {variant}
+            </Button>
+          </div>
+        ))}
+      </div>
+    );
+  }
+};

packages/react-formio/src/molecules/button/Button.tsx

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+import cx from "classnames";
+import { type ButtonHTMLAttributes, forwardRef, type LegacyRef, type PropsWithChildren } from "react";
+
+import { registerComponent } from "../../registries/components";
+
+export const BUTTON_VARIANTS = [
+  "primary",
+  "secondary",
+  "success",
+  "danger",
+  "warning",
+  "info",
+  "light",
+  "dark",
+  "link",
+  "outline-primary",
+  "outline-secondary",
+  "outline-success",
+  "outline-danger",
+  "outline-warning",
+  "outline-info",
+  "outline-light",
+  "outline-dark",
+  "outline-link"
+];
+
+export interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
+  variant?: (typeof BUTTON_VARIANTS)[keyof typeof BUTTON_VARIANTS] | string;
+}
+
+export const Button = forwardRef(
+  ({ variant, className, children, ...props }: PropsWithChildren<ButtonProps>, ref: LegacyRef<HTMLButtonElement>) => {
+    return (
+      <button
+        {...props}
+        ref={ref}
+        className={cx(
+          "btn flex gap-1",
+          {
+            disabled: props.disabled
+          },
+          `btn-${variant}`,
+          className
+        )}
+        disabled={props.disabled}
+        onClick={(evt) => !props.disabled && props.onClick?.(evt)}
+      >
+        {children}
+      </button>
+    );
+  }
+);
+
+registerComponent("Button", Button);