fix(dashboard): Replace react-nestable with new SortableTree component (#8599)

**What**
- Removes `react-nestable` dependency in favour of our own solution based on `@dnd-kit/core`

Resolves CC-217

yarn.lock

@@ -4508,7 +4508,6 @@ __metadata:
     react-hook-form: 7.49.1
     react-i18next: 13.5.0
     react-jwt: ^1.2.0
-    react-nestable: ^3.0.2
     react-router-dom: 6.20.1
     tailwindcss: ^3.4.1
     tsup: ^8.0.2
@@ -25965,24 +25964,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"react-addons-shallow-compare@npm:^15.6.3":
-  version: 15.6.3
-  resolution: "react-addons-shallow-compare@npm:15.6.3"
-  dependencies:
-    object-assign: ^4.1.0
-  checksum: ad1a2ef7adf1a307b55de58a99ccf40998a1f7c84dcaadb1a2dd40c0e21e911b84fe04ab5f3494a1118846fc7537043287d54bcaffc2daf819b6c45eef5635ce
-  languageName: node
-  linkType: hard
-
-"react-addons-update@npm:^15.6.3":
-  version: 15.6.3
-  resolution: "react-addons-update@npm:15.6.3"
-  dependencies:
-    object-assign: ^4.1.0
-  checksum: b6d98b459eb37393b8103309090b36649c0a0e95c7dbe010e692616eb025baf62b53cb187925ecce0c3ed0377357ce03c3a45a8ec2d91e6886f8d2eb55b0dfd1
-  languageName: node
-  linkType: hard
-
 "react-aria@npm:^3.33.1":
   version: 3.33.1
   resolution: "react-aria@npm:3.33.1"
@@ -26194,19 +26175,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"react-nestable@npm:^3.0.2":
-  version: 3.0.2
-  resolution: "react-nestable@npm:3.0.2"
-  dependencies:
-    classnames: ^2.3.2
-    react: ^18.2.0
-    react-addons-shallow-compare: ^15.6.3
-    react-addons-update: ^15.6.3
-    react-dom: ^18.2.0
-  checksum: e2a7947382ca28e12048c534a2ad6e544dff60a56e712b7a1b00838434c5b5444b4c50c1fd652e032710b567674b4eff36ee4c3a5021c02f933d11c7b88ce7b9
-  languageName: node
-  linkType: hard
-
 "react-refresh@npm:^0.14.0":
   version: 0.14.2
   resolution: "react-refresh@npm:0.14.2"