refactor: Move user config into modules/

modules/home/users/crumb/emacs/project-skeletons/clj-nix/flake.nix

@@ -0,0 +1,47 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    clj-nix.url = "github:jlesquembre/clj-nix";
+  };
+
+  outputs = { self, ... }@inputs:
+    inputs.flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = import inputs.nixpkgs {
+            inherit system;
+            overlays = [
+              inputs.clj-nix.overlays.default
+            ];
+          };
+      in {
+        packages = rec {
+          __PROJECT-NAME__ = inputs.clj-nix.lib.mkCljApp {
+            pkgs = inputs.nixpkgs.legacyPackages.${system};
+            modules = [
+              {
+                name = "__PROJECT-OWNER__/__PROJECT-NAME__";
+                version = "1.0.0";
+                main-ns = "__PROJECT-NAME__.main";
+                projectSrc = ./.;
+
+                nativeImage = {
+                  # Disable for faster build times.
+                  enable = true;
+                };
+              }
+            ];
+          };
+
+          default = __PROJECT-NAME__;
+        };
+
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [
+            clojure-lsp
+            cljfmt
+            clojure
+            babashka
+          ];
+        };
+      });
+}