feat: internal page links and mentions (#604)

* Work on mentions

* fix: properly parse page slug

* fix editor suggestion bugs

* mentions must start with whitespace

* add icon to page mention render

* feat: backlinks - WIP

* UI - WIP

* permissions check
* use FTS for page suggestion

* cleanup

* WIP

* page title fallback

* feat: handle internal link paste

* link styling

* WIP

* Switch back to LIKE operator for search suggestion

* WIP
* scope to workspaceId
* still create link for pages not found

* select necessary columns

* cleanups

apps/client/src/features/editor/components/link/link.module.css

@@ -0,0 +1,6 @@
+.link {
+    color: light-dark(var(--mantine-color-dark-4), var(--mantine-color-dark-1));
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}