Move rust components to devShell instead of global rust-toolchain

flake.nix

@@ -25,11 +25,10 @@
         devShells = {
           default = pkgs.mkShell {
             buildInputs = [
-              rust
+              (rust.override { extensions = ["rust-src" "rust-analyzer"]; })
               nodejs
               pkgs.cargo-leptos
               pkgs.dart-sass
-              pkgs.rust-analyzer
             ];
           };
         };

rust-toolchain.toml

@@ -1,4 +1,3 @@
 [toolchain]
 channel = "nightly"
-components = ["rust-std", "rust-src", "rustc-dev" ]
 targets = ["wasm32-unknown-unknown"]