Replace the dev server's wasm-pack, cargo-watch, and concurrently tools with custom cargo-run tooling (#4254)

Replace wasm-pack, cargo-watch and concurrently with custom build tooling

Co-authored-by: Keavon Chambers <keavon@keavon.com>

.nix/dev.nix

@@ -30,7 +30,6 @@ pkgs.mkShell (
       pkgs.nodejs
       pkgs.binaryen
       pkgs.wasm-bindgen-cli_0_2_121
-      pkgs.wasm-pack
       pkgs.cargo-about
 
       pkgs.rustc
@@ -41,7 +40,6 @@ pkgs.mkShell (
 
       pkgs.git
 
-      pkgs.cargo-watch
       pkgs.cargo-nextest
       pkgs.cargo-expand