chore: add flake profiles and bun.lockb file

.direnv/flake-profile

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+flake-profile-2-link

.direnv/flake-profile-1-link

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+/nix/store/3hvzb7brklcrpdggn78fnmi20i49jnys-nix-shell-env

.direnv/flake-profile-2-link

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+/nix/store/amb6zvwfmy0l7yfdhrfaclcy4997fy03-nix-shell-env

.envrc

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+use flake

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1725634671,
+        "narHash": "sha256-v3rIhsJBOMLR8e/RNWxr828tB+WywYIoajrZKFM+0Gg=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "574d1eac1c200690e27b8eb4e24887f8df7ac27c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "Hotel-Manager";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs, ... }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in
+    {
+      devShells.${system}.default =
+        pkgs.mkShell
+          {
+            buildInputs = [
+              pkgs.nodePackages."@angular/cli"
+              pkgs.git
+              pkgs.bun
+            ];
+
+            RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+
+            shellHook = ''
+export CARGO_HOME=$HOME/.cargo
+export RUSTUP_HOME=$HOME/.rustup
+            '';
+          };
+    };
+}