Move the CreateResult enum into the releases mod

This thing only needs to exist so Serde can decode the response JSON
properly. I'll either get a success, a missing token, *no body at all
which doesnt' make sense*, or some other ApiError text. In all cases,
the crate::Result is returned. This thing doesn't need to be public.

src/api/release.rs

@@ -1,6 +1,8 @@
 
+use serde::{Deserialize, Serialize};
+
 use crate::{
-    structs::release::{CreateReleaseOption, Release}, CreateResult, Result
+    structs::{self, release::{CreateReleaseOption, Release}}, ApiError, Result
 };
 
 pub fn get_release(id: u64) -> Result<Release> { todo!(); }
@@ -31,6 +33,14 @@ pub async fn list_releases(
     return Ok(release_list);
 }
 
+#[derive(Debug, Deserialize, Serialize)]
+#[serde(untagged)]
+enum CreateResult {
+    Success(structs::release::Release),
+    ErrWithMessage(ApiError),
+    Empty,
+}
+
 pub async fn create_release(
     client: &reqwest::Client,
     gitea_url: &str,

src/lib.rs

@@ -27,10 +27,3 @@ impl From<reqwest::Error> for crate::Error {
 
 type Result<T> = core::result::Result<T, Error>;
 
-#[derive(Debug, Deserialize, Serialize)]
-#[serde(untagged)]
-pub enum CreateResult {
-    Success(structs::release::Release),
-    ErrWithMessage(ApiError),
-    Empty,
-}