feat: switch from full/fat to thin LTO

This slightly increases binary size, but provides much better compile
speed in release mode. Overall performance should not decrease a lot and
if needed later, full/fat LTO can be turned back on again.

Cargo.toml

@@ -40,5 +40,5 @@ syn = "2.0.48"
 thiserror = "1.0.56"
 
 [profile.release]
-lto = true
+lto = "thin"
 strip = true