chore: migrate to Forgejo

flake.nix

@@ -0,0 +1,39 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    pre-commit-hooks = {
+      url = "github:cachix/git-hooks.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    { self
+    , nixpkgs
+    , flake-utils
+    , ...
+    }@inputs:
+    flake-utils.lib.eachDefaultSystem (system:
+    let
+      pkgs = import nixpkgs {
+        inherit system;
+      };
+      # Place all toolchain components in a single directory for IntelliJ
+      rust-toolchain = pkgs.symlinkJoin {
+        name = "rust-toolchain";
+        paths = with pkgs; [
+          rustc
+          cargo
+          rustPlatform.rustcSrc
+        ] ++ lib.optionals stdenv.isDarwin [
+          libiconv
+        ];
+      };
+    in
+    {
+      checks = import ./nix/git-hooks.nix { inherit inputs pkgs; };
+      devShells = import ./nix/shell.nix { inherit pkgs rust-toolchain self; };
+      formatter = pkgs.nixpkgs-fmt;
+    });
+}