Support headings in link-list (#1531)

Refactor the `<LinkList>` API to allow headings within link lists.

- `<LinkListItem>` no longer supports link props, the component must now
receive a `<Link>` as a child to which link props are passed. This makes
for a more consistant and more granualar API.
- Extracts all styling from the React implementation of `<LinkList>` to
the tailwind package.
- Removes the `isExternal` prop from the`<LinkListItem>`. External links
are now identified byt the `rel` prop on the `<Link>` child (e.g `<Link
rel="external">`). This is more consistent with how we control the
`DownloadIcon ` (`download` attribute), and it fits nicely with the
`<Link>` API.
- The `<Link>` component has also been extended with an internal
`_innerWrapper` prop, similar to what we have in `Heading` component.
This allows the `<LinkList>` to provide the correct icond for each link.

<img width="1058" height="898" alt="Screenshot 2025-11-18 at 13 11 33"
src="https://github.com/user-attachments/assets/ebbc0c64-56b4-489e-8e60-712ecc2bafeb"
/>

<img width="1072" height="1255" alt="Screenshot 2025-11-18 at 13 12 01"
src="https://github.com/user-attachments/assets/3326fd11-fabf-4ffd-a34f-cc781371804c"
/>

Author: oscarcarlstrom

.changeset/brave-windows-tap.md

@@ -0,0 +1,70 @@
+---
+"@obosbbl/grunnmuren-react": patch
+---
+
+## Breaking Beta change
+The `<LinkList>` API has now been refactored to support headings inside link lists.
+
+- `<LinkListItem>` no longer supports link props, the component must now receive a `<Link>` as a child to which link props are passed
+- The `isExternal` prop has been removed `<LinkListItem>`. External links are now identified byt the `rel` prop on the `<Link>` child (e.g `<Link rel="external">`)
+
+
+### Before
+``` tsx
+<LinkList>
+  <LinkListItem href="/medlem">Les mer</LinkListItem>
+  <LinkListItem download href="/medlemsvilkar.pdf">
+    Medlemsvilkår
+  </LinkListItem>
+  <LinkListItem
+    href="https://www.tryg.no/forsikringer/fordeler-hos-tryg/bruk-medlemsfordelene-dine/obos/index.html?cmpid=obos_tryggjennomlivet"
+    rel="external"
+  >
+    Tryg forsikring
+  </LinkListItem>
+</LinkList>
+```
+
+### Now
+``` tsx
+<LinkList>
+  <LinkListItem>
+    <Link href="/bolig">Bolig</Link>
+  </LinkListItem>
+  <LinkListItem>
+    <Link href="/bank" download href="/medlemsvilkar.pdf">
+      Medlemsvilkår
+    </Link>
+  </LinkListItem>
+  <LinkListItem>
+    <Link
+      href="/medlem"
+      href="https://www.tryg.no/forsikringer/fordeler-hos-tryg/bruk-medlemsfordelene-dine/obos/index.html?cmpid=obos_tryggjennomlivet"
+      rel="external"
+    >
+      Tryg forsikring
+    </Link>
+  </LinkListItem>
+</LinkList>
+```
+
+## Use Headings (with links)
+
+``` tsx
+<LinkListContainer>
+  <Heading level={2}>
+    <Link href="/om">OBOS</Link>
+  </Heading>
+  <LinkList>
+    <LinkListItem>
+      <Link href="/bolig">Bolig</Link>
+    </LinkListItem>
+    <LinkListItem>
+      <Link href="/bank">Bank</Link>
+    </LinkListItem>
+    <LinkListItem>
+      <Link href="/medlem">Medlem</Link>
+    </LinkListItem>
+  </LinkList>
+</LinkListContainer>
+```

.changeset/mean-coats-admire.md

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+---
+"@obosbbl/grunnmuren-react": patch
+---
+
+Better screen reader support in the `<Link>` component: annonuce external links.

.changeset/orange-breads-flow.md

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+---
+"@obosbbl/grunnmuren-tailwind": patch
+---
+
+Styles for headings and icons inside link lists.