feat(auth): initialize service

- Make rule `sql`: convert .dbml file to .sql file
- Removed tests: not used...
- Added dbml_sqlite to flake.nix

flake.nix

@@ -1,13 +1,20 @@
 {
   description = "Flake utils demo";
 
-  inputs.nixpkgs.url = "github:nixos/nixpkgs";
-  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs";
+    flake-utils.url = "github:numtide/flake-utils";
+    dbmlSQLite = {
+      url = "github:maix0/DBML_SQLite";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
 
   outputs = {
     self,
     nixpkgs,
     flake-utils,
+    dbmlSQLite,
   }:
     flake-utils.lib.eachDefaultSystem (
       system: let
@@ -21,7 +28,8 @@
             nodejs_24
             pnpm
             typescript
-            
+            dbmlSQLite.packages.${system}.default
+
             # allow building better-sqlite3
             clang
           ];