Allow relative assets in rust > 1.88 (#4658)

* Allow relative assets in rust > 1.88 and assets outside of the crate in
binary crates

* undo changes to assets outside of the crate

* don't use relative assets in examples

Cargo.toml

@@ -276,7 +276,7 @@ serde_json = "1.0.140"
 serde = "1.0.219"
 syn = "2.0"
 quote = "1.0"
-proc-macro2 = "1.0"
+proc-macro2 = "1.0.101"
 axum_session = "0.16.0"
 axum_session_auth = "0.16.0"
 axum_session_sqlx = "0.5.0"