feat: basic flake-parts structure, make-shell, files and readme

modules/meta/files.nix

@@ -0,0 +1,7 @@
+{ inputs, ... }:
+{
+  imports = [ inputs.files.flakeModules.default ];
+  perSystem = psArgs: {
+    make-shells.default.packages = [ psArgs.config.files.writer.drv ];
+  };
+}

modules/meta/make-shell.nix

@@ -0,0 +1,4 @@
+{ inputs, ... }:
+{
+  imports = [ inputs.make-shell.flakeModules.default ];
+}