feat: anchor links (#1765)

* feat: add heading extension with unique ID support and scroll functionality
* Added unique id for heading
* remove baseUrl heading storage
* move heading to extensions package
* WIP
* support anchors in mentions
* enhance scrolling functionality
* nodeId function
* fix nanoid import
* Bring unique-id extension local
* fixes
* fix internal link scroll in public pages
* add unique id server side
* rename mention anchor to anchorId
* capture first anchorId on paste

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Co-authored-by: Romik <40670677+RomikMakavana@users.noreply.github.com>

packages/editor-ext/src/index.ts

@@ -21,3 +21,5 @@ export * from "./lib/search-and-replace";
 export * from "./lib/embed-provider";
 export * from "./lib/subpages";
 export * from "./lib/highlight";
+export * from "./lib/heading/heading";
+export * from "./lib/unique-id";