chore: update home-manager packages and environment variables

- Removed `cachix`, `charm-freeze`, `lazydocker`, and `slides` from home.packages
- Added `devcontainer` to home.packages
- Updated `PATH` environment variable to include `$GOPATH/bin` and `$HOME/.docker/bin` before the existing `$PATH`

lib/shared/home-manager.nix

@@ -23,19 +23,16 @@ in {
 
   home.packages = with pkgs; [
     awscli2
-    cachix
-    charm-freeze
+    devcontainer
     doppler
     fd
     gh
     httpie
     jq
     k9s
     kubectl
-    lazydocker
     ripgrep
     shell-gpt
-    slides
     z-lua
   ];
 
@@ -47,7 +44,7 @@ in {
     LANG = "en_US.UTF-8";
     LC_ALL = "en_US.UTF-8";
     LC_CTYPE = "en_US.UTF-8";
-    PATH = "$PATH:$GOPATH/bin";
+    PATH = "$GOPATH/bin:$HOME/.docker/bin:$PATH";
     PULUMI_K8S_SUPPRESS_HELM_HOOK_WARNINGS = "true";
     PULUMI_SKIP_UPDATE_CHECK = "true";
   };