Upgrade to Rust 1.87 (#7346)

I ignored some new clippy lints about large differences between enum variants.
We can always revisit these later (the compiler suggests boxing them so
that the enum variants are similar size)

rust/kcl-lib/src/parsing/ast/types/mod.rs

@@ -454,7 +454,7 @@ impl Node<Program> {
                         alpha: c.a,
                     },
                 };
-                if colors.borrow().iter().any(|c| *c == color) {
+                if colors.borrow().contains(&color) {
                     return;
                 }
                 colors.borrow_mut().push(color);