refactor: organize hosts configs into dedicated directory

- Move and rename host-specific configurations (e.g., wsl to hosts/wsl)
- Add home.nix files for mbp and wsl, importing common modules
- Update mbp flake.nix path to new hosts/mbp/configuration.nix
- Integrate home-manager for user environments on macOS/WSL
- Update flake.lock inputs (nixpkgs, home-manager, homebrew) for latest versions
- Add README.md with project overview and setup instructions

This restructures the repo for multi-host support, improves modularity, and ensures reproducible builds with updated dependencies.

hosts/mbp/home.nix

@@ -0,0 +1,22 @@
+{ config, pkgs, lib, ... }:
+
+{
+  imports = [
+    ../../modules/common.nix
+    ../../modules/programs/bat.nix
+    ../../modules/programs/eza.nix
+    ../../modules/programs/fzf.nix
+    ../../modules/programs/git.nix
+    ../../modules/programs/k9s.nix
+    ../../modules/programs/micro.nix
+    ../../modules/programs/ssh.nix
+    ../../modules/programs/zoxide.nix
+    ../../modules/programs/zsh.nix
+  ];
+
+	programs.zsh = {
+		localVariables = {
+      SSH_AUTH_SOCK = "/Users/duumxh/Library/Containers/com.maxgoedjen.Secretive.SecretAgent/Data/socket.ssh";
+		};
+	};
+}