fix: updated folder name to not be the deprecated (#8793)

* Updated folder name to not be the deprecated

* Changed backend to use Starter Project as default folder name

* Changed docs

* Changed frontend to display pure folder name without deprecated

* Updated tests

* Added migration to change folder name

* Refactor migration to rename folder names with unique constraint checks for users. Updated upgrade and downgrade functions to streamline the renaming process for "My Projects" and "Starter Project".

---------

Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>

docs/docs/API-Reference/api-projects.md

@@ -29,7 +29,7 @@ curl -X GET \
 ```json
 [
   {
-    "name": "My Projects",
+    "name": "Starter Project",
     "description": "Manage your own projects. Download and upload projects.",
     "id": "1415de42-8f01-4f36-bf34-539f23e47466",
     "parent_id": null
@@ -116,7 +116,7 @@ curl -X GET \
 ```json
 [
   {
-    "name": "My Projects",
+    "name": "Starter Project",
     "description": "Manage your own projects. Download and upload projects.",
     "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
     "parent_id": null
@@ -216,4 +216,4 @@ curl -X POST \
   -H "accept: application/json" \
   -H "Content-Type: multipart/form-data" \
   -F "file=@20241230_135006_langflow_flows.zip;type=application/zip"
-```
+```