Migrate to parking_lot

Cargo.toml

@@ -8,7 +8,6 @@ iced = { version = "0.14.0", features = ["tokio", "svg", "lazy"]}
 iced_core = "0.14.0"
 rand = "0.10.2"
 dirs = "6.0.0"
-serde = { version = "1.0.229", features = ["derive"] }
 serde_json = "1.0.151"
 rhai = { version = "1.25.1", features = ["sync"] }
 chrono = "0.4.45"
@@ -24,6 +23,7 @@ rfd = "0.17.2"
 mimalloc = "0.1.52"
 hashbrown = "0.17.1"
 rayon = "1.12.0"
+parking_lot = "0.12.5"
 
 [profile.super-release]
 inherits = "release"