Releases can now be created... sorta

The API token is read from the environment variable `RELEASE_KEY_GITEA`.
"GITEA" is on the end because Gitea itself will refuse to allow users to
configure Act variables starting with the name "GITEA_".

All information about the release is hard-coded right now. I just needed
to see it hit the API and appear on the Gitea page. Hooking up the extra
options is up next.

src/lib.rs

@@ -1,4 +1,4 @@
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 
 pub mod cli;
 
@@ -35,3 +35,26 @@ pub struct Author {
     full_name: String,
     email: String,
 }
+
+#[derive(Serialize, Debug)]
+pub struct CreateReleaseOption {
+    body: String,
+    draft: bool,
+    name: String,
+    prerelease: bool,
+    tag_name: String,
+    target_commitish: String,
+}
+
+impl CreateReleaseOption {
+    pub fn new(name: String) -> Self {
+        Self{
+            body: String::from("hard-coded test body"),
+            draft: true,
+            name,
+            prerelease: true,
+            tag_name: String::from("hard-coded-test"),
+            target_commitish: String::from("3171c892480c46976106fa465d04fdb7e734dd53")
+        }
+    }
+}