feat: add nix package, module, and container

Signed-off-by: seth <getchoo@tuta.io>

nix/dev.nix

@@ -0,0 +1,50 @@
+{
+  perSystem = {
+    lib,
+    pkgs,
+    config,
+    ...
+  }: {
+    pre-commit.settings.hooks = {
+      actionlint.enable = true;
+      alejandra.enable = true;
+      rustfmt.enable = true;
+      nil.enable = true;
+      prettier = {
+        enable = true;
+        excludes = ["flake.lock"];
+      };
+    };
+
+    proc.groups.daemons.processes = {
+      redis.command = "${lib.getExe' pkgs.redis "redis-server"}";
+    };
+
+    devShells.default = pkgs.mkShell {
+      shellHook = ''
+        ${config.pre-commit.installationScript}
+      '';
+
+      packages = with pkgs; [
+        # general
+        actionlint
+        config.proc.groups.daemons.package
+
+        # rust
+        cargo
+        rustc
+        clippy
+        rustfmt
+        rust-analyzer
+
+        # nix
+        config.formatter
+        nil
+      ];
+
+      RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+    };
+
+    formatter = pkgs.alejandra;
+  };
+}