refactor: bring in the modules

Signed-off-by: Gunwant Jain <mail@wantguns.dev>

src/routes/retrieve.rs

@@ -0,0 +1,10 @@
+use std::fs::File;
+
+use crate::models::paste_id::PasteId;
+
+#[get("/<id>")]
+pub async fn retrieve(id: PasteId<'_>) -> Option<File> {
+    let filename = format!("upload/{id}", id = id);
+
+    File::open(&filename).ok()
+}