chore: move image stuff to axum-image

crates/app/src/routes/api/v1/communities/posts.rs

@@ -16,7 +16,6 @@ use tetratto_core::model::{
 };
 use crate::{
     check_user_blocked_or_private, get_user_from_token,
-    image::{save_webp_buffer, JsonMultipart},
     routes::{
         api::v1::{
             CreatePost, CreateRepost, UpdatePostContent, UpdatePostContext, UpdatePostIsOpen,
@@ -26,6 +25,7 @@ use crate::{
     },
     State,
 };
+use axum_image::{encode::save_webp_buffer, extract::JsonMultipart};
 
 // maximum file dimensions: 2048x2048px (4 MiB)
 pub const MAXIMUM_FILE_SIZE: usize = 4194304;