As alist backend doesnt support anytype proxy,
AND modify the backend to remove the limit would be a breaking change,
This simple PR would be closed. If you have any idea, please leave a reply.

I think make a option to enable AnyType Proxy in the config/admin console may be a solution.
What If we add a check for "enable_anytype_proxy" in the conf/admin console in the "server\handles\down.go" of backend AND "src\pages\home\previews\index.ts" of the frontend to display Text Editor?
I dont know if checking the status of the option in the frontend is feasible.
I need your decision, @xhofe. Thanks a lot. And I hope this wont interrupt your work.

We could consider adding wildcards to text file types