test: add basic test for flakeModule functionality

flakeModuleTest/flake.nix

@@ -1,43 +0,0 @@
-{
-  outputs = {
-    flake-parts,
-    systems,
-    ...
-  } @ inputs:
-    flake-parts.lib.mkFlake {inherit inputs;} {
-      imports = [
-        ../lib/flakeModule.nix
-      ];
-      systems = import systems;
-      flake = {};
-      perSystem = {
-        ...
-      }: {
-        ci = {
-          config = {
-            # true is already default, just for testing
-            nixJobsByDefault = true;
-          };
-          pipelines = {
-            "default" = {
-              stages = ["example"];
-              jobs."example" = {
-                stage = "example";
-                script = ["echo hello world"];
-              };
-            };
-            "test".jobs."example" = {
-              stage = ".pre";
-              script = ["echo hello world"];
-            };
-          };
-        };
-      };
-    };
-
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-    flake-parts.url = "github:hercules-ci/flake-parts";
-    systems.url = "github:nix-systems/default-linux";
-  };
-}