diesel instead of sea-orm

sea-orm was getting to be bigger hassle I think and harder to compile,
diesel seems simple and effective enough.

src/rust/models.rs

@@ -0,0 +1,8 @@
+use diesel::prelude::*;
+
+#[derive(Queryable)]
+pub struct Image {
+    pub id: i32,
+    pub title: String,
+    pub path: String,
+}