feat(next): improved lexical richText diffing in version view (#11760)

This replaces our JSON-based richtext diffing with HTML-based richtext
diffing for lexical. It uses [this HTML diff
library](https://github.com/Arman19941113/html-diff) that I then
modified to handle diffing more complex elements like links, uploads and
relationships.

This makes it way easier to spot changes, replacing the lengthy Lexical
JSON with a clean visual diff that shows exactly what's different.

## Before

![CleanShot 2025-03-18 at 13 54
51@2x](https://github.com/user-attachments/assets/811a7c14-d592-4fdc-a1f4-07eeb78255fe)


## After


![CleanShot 2025-03-31 at 18 14
10@2x](https://github.com/user-attachments/assets/efb64da0-4ff8-4965-a458-558a18375c46)
![CleanShot 2025-03-31 at 18 14
26@2x](https://github.com/user-attachments/assets/133652ce-503b-4b86-9c4c-e5c7706d8ea6)

test/versions/payload-types.ts

@@ -78,6 +78,7 @@ export interface Config {
     'version-posts': VersionPost;
     'custom-ids': CustomId;
     diff: Diff;
+    text: Text;
     media: Media;
     users: User;
     'payload-jobs': PayloadJob;
@@ -98,6 +99,7 @@ export interface Config {
     'version-posts': VersionPostsSelect<false> | VersionPostsSelect<true>;
     'custom-ids': CustomIdsSelect<false> | CustomIdsSelect<true>;
     diff: DiffSelect<false> | DiffSelect<true>;
+    text: TextSelect<false> | TextSelect<true>;
     media: MediaSelect<false> | MediaSelect<true>;
     users: UsersSelect<false> | UsersSelect<true>;
     'payload-jobs': PayloadJobsSelect<false> | PayloadJobsSelect<true>;
@@ -414,6 +416,16 @@ export interface Media {
   focalX?: number | null;
   focalY?: number | null;
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "text".
+ */
+export interface Text {
+  id: string;
+  text: string;
+  updatedAt: string;
+  createdAt: string;
+}
 /**
  * This interface was referenced by `Config`'s JSON-Schema
  * via the `definition` "users".
@@ -574,6 +586,10 @@ export interface PayloadLockedDocument {
         relationTo: 'diff';
         value: string | Diff;
       } | null)
+    | ({
+        relationTo: 'text';
+        value: string | Text;
+      } | null)
     | ({
         relationTo: 'media';
         value: string | Media;
@@ -842,6 +858,15 @@ export interface DiffSelect<T extends boolean = true> {
   updatedAt?: T;
   createdAt?: T;
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "text_select".
+ */
+export interface TextSelect<T extends boolean = true> {
+  text?: T;
+  updatedAt?: T;
+  createdAt?: T;
+}
 /**
  * This interface was referenced by `Config`'s JSON-Schema
  * via the `definition` "media_select".