refactor(components): rewrite Button and ButtonLink components

Both:
* move styles to Sass placeholders

Button:
* add `isPressed` prop to Button
* add `isLoading` prop to Button (to differentiate state from
disabled)

ButtonLink:
* replace `external` prop with `isExternal` prop
* replace `href` prop with `to` prop

1 files changed, 172 insertions, 0 deletions

diff --git a/src/components/atoms/buttons/button/button.stories.tsx b/src/components/atoms/buttons/button/button.stories.tsx
new file mode 100644
index 0000000..5ce28fb
--- /dev/null
+++ b/src/components/atoms/buttons/button/button.stories.tsx
@@ -0,0 +1,172 @@
+import type { ComponentMeta, ComponentStory } from '@storybook/react';
+import { Button } from './button';
+
+/**
+ * Button - Storybook Meta
+ */
+export default {
+  title: 'Atoms/Buttons/Button',
+  component: Button,
+  args: {
+    type: 'button',
+  },
+  argTypes: {
+    children: {
+      control: {
+        type: 'text',
+      },
+      description: 'The button body.',
+      type: {
+        name: 'string',
+        required: true,
+      },
+    },
+    isDisabled: {
+      control: {
+        type: 'boolean',
+      },
+      description: 'Should the button be disabled?',
+      table: {
+        category: 'Options',
+        defaultValue: { summary: false },
+      },
+      type: {
+        name: 'boolean',
+        required: false,
+      },
+    },
+    isLoading: {
+      control: {
+        type: 'boolean',
+      },
+      description:
+        'Should the button be disabled because it is loading something?',
+      table: {
+        category: 'Options',
+        defaultValue: { summary: false },
+      },
+      type: {
+        name: 'boolean',
+        required: false,
+      },
+    },
+    isPressed: {
+      control: {
+        type: 'boolean',
+      },
+      description: 'Define if the button is currently pressed.',
+      table: {
+        category: 'Options',
+        defaultValue: { summary: false },
+      },
+      type: {
+        name: 'boolean',
+        required: false,
+      },
+    },
+    kind: {
+      control: {
+        type: 'select',
+      },
+      description: 'Button kind.',
+      options: ['primary', 'secondary', 'tertiary', 'neutral'],
+      table: {
+        category: 'Options',
+        defaultValue: { summary: 'secondary' },
+      },
+      type: {
+        name: 'string',
+        required: false,
+      },
+    },
+    onClick: {
+      control: {
+        type: null,
+      },
+      description: 'A callback function to handle click.',
+      table: {
+        category: 'Events',
+      },
+      type: {
+        name: 'function',
+        required: false,
+      },
+    },
+    shape: {
+      control: {
+        type: 'select',
+      },
+      description: 'The link shape.',
+      options: ['circle', 'rectangle', 'square', 'initial'],
+      table: {
+        category: 'Options',
+        defaultValue: { summary: 'rectangle' },
+      },
+      type: {
+        name: 'string',
+        required: false,
+      },
+    },
+    type: {
+      control: {
+        type: 'select',
+      },
+      description: 'Button type attribute.',
+      options: ['button', 'reset', 'submit'],
+      table: {
+        category: 'Options',
+        defaultValue: { summary: 'button' },
+      },
+      type: {
+        name: 'string',
+        required: false,
+      },
+    },
+  },
+} as ComponentMeta<typeof Button>;
+
+const Template: ComponentStory<typeof Button> = (args) => <Button {...args} />;
+
+const logClick = () => {
+  console.log('Button has been clicked!');
+};
+
+/**
+ * Button Story - Primary
+ */
+export const Primary = Template.bind({});
+Primary.args = {
+  children: 'Click on the button',
+  kind: 'primary',
+  onClick: logClick,
+};
+
+/**
+ * Button Story - Secondary
+ */
+export const Secondary = Template.bind({});
+Secondary.args = {
+  children: 'Click on the button',
+  kind: 'secondary',
+  onClick: logClick,
+};
+
+/**
+ * Button Story - Tertiary
+ */
+export const Tertiary = Template.bind({});
+Tertiary.args = {
+  children: 'Click on the button',
+  kind: 'tertiary',
+  onClick: logClick,
+};
+
+/**
+ * Button Story - Neutral
+ */
+export const Neutral = Template.bind({});
+Neutral.args = {
+  children: 'Click on the button',
+  kind: 'neutral',
+  onClick: logClick,
+};