refactor: add nix and linters

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -2,4 +2,10 @@
 *.zip
 
 # Exclude exported Modrinth modpacks
-*.mrpack
+*.mrpack
+
+# Exclude .direnv
+.direnv
+
+# Eclude precommit hooks config
+.pre-commit-config.yaml

flake.nix

@@ -0,0 +1,44 @@
+{
+  description = "A template designed to streamline the release process of Minecraft modpacks.";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-parts = {
+      url = "github:hercules-ci/flake-parts";
+      inputs.nixpkgs-lib.follows = "nixpkgs";
+    };
+    pre-commit-hooks = {
+      url = "github:cachix/pre-commit-hooks.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+  outputs = inputs:
+    inputs.flake-parts.lib.mkFlake {inherit inputs;} {
+      systems = ["x86_64-linux"];
+
+      imports = [
+        ./pre-commit-hooks.nix
+      ];
+
+      perSystem = {
+        config,
+        pkgs,
+        ...
+      }: {
+        devShells.default = pkgs.mkShell {
+          packages = [
+            pkgs.alejandra
+            pkgs.git
+            pkgs.packwiz
+            pkgs.yamllint
+          ];
+          name = "mc-modpack-kit";
+          DIRENV_LOG_FORMAT = "";
+          shellHook = ''
+            ${config.pre-commit.installationScript}
+          '';
+        };
+
+        formatter = pkgs.alejandra;
+      };
+    };
+}

pre-commit-hooks.nix

@@ -0,0 +1,15 @@
+{inputs, ...}: {
+  imports = [inputs.pre-commit-hooks.flakeModule];
+
+  perSystem.pre-commit = {
+    settings.excludes = ["flake.lock"];
+
+    settings = {
+      hooks = {
+        alejandra.enable = true;
+        yamllint.enable = true;
+      };
+      settings.yamllint.relaxed = true;
+    };
+  };
+}