docs: use PascalCase for file name (#350)

apps/documentation/src/components/MdxProvider/MdxLink/MdxLink.tsx

@@ -0,0 +1,36 @@
+import type { JSX, AnchorHTMLAttributes } from 'react'
+import { Button } from '@mantine/core'
+import { Link } from 'tuono'
+import { IconExternalLink } from '@tabler/icons-react'
+
+export default function MdxLink(
+  props: AnchorHTMLAttributes<HTMLAnchorElement>,
+): JSX.Element {
+  if (props.href?.startsWith('http') || props.href?.startsWith('mailto')) {
+    return (
+      <Button
+        component="a"
+        {...props}
+        target="_blank"
+        rightSection={
+          <IconExternalLink size="16px" style={{ marginLeft: -5 }} />
+        }
+        variant="transparent"
+        style={{ height: '20px' }}
+        mt={-2}
+        p={0}
+      />
+    )
+  }
+  return (
+    <Button
+      component={Link}
+      {...props}
+      target="_blank"
+      variant="transparent"
+      style={{ height: '20px' }}
+      mt={-2}
+      p={0}
+    />
+  )
+}