simplify some things and remove some unused code

home/develop/devenv.nix

@@ -0,0 +1,3 @@
+{pkgs, ...}: {
+  home.packages = with pkgs; [devenv];
+}

home/develop/langs/c.nix

@@ -0,0 +1,3 @@
+{pkgs, ...}: {
+  home.packages = with pkgs; [clang-tools buckle gdb lldb];
+}

home/develop/langs/lua.nix

@@ -1,6 +1,6 @@
 {pkgs, ...}: {
   home.packages = with pkgs; [
-    nil
-    alejandra
+    stylua
+    lua-language-server
   ];
 }

home/develop/langs/nix.nix

@@ -0,0 +1,3 @@
+{pkgs, ...}: {
+  home.packages = with pkgs; [nil nixd alejandra nixfmt-rfc-style];
+}

home/develop/langs/zig.nix

@@ -0,0 +1,3 @@
+{pkgs, ...}: {
+  home.packages = with pkgs; [zig zls];
+}