Initial Commit

TODOS:
1. Ensure memory.x has correct memory regions.
2. Add HAL loop delay.

nix/flake.nix

@@ -0,0 +1,48 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
+
+     rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    inputs@{ ... }:
+    let
+      supportedSystems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+      forAllSystems = inputs.nixpkgs.lib.genAttrs supportedSystems;
+      buildNixpkgs =
+        system:
+        import inputs.nixpkgs {
+          inherit system;
+          overlays = [ (import inputs.rust-overlay) ];
+        };
+    in
+    {
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = buildNixpkgs system;
+
+          rust-toolchain = pkgs.rust-bin.fromRustupToolchainFile ../rust-toolchain.toml;
+        in
+        {
+          default = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              gcc-arm-embedded-13
+              treefmt
+              nixpkgs-fmt
+              rust-toolchain
+            ];
+          };
+        }
+      );
+    };
+}