nix: fused redundant devShells into one for carbon

This consolidates multiple devShells, and make all these packages
available for carbon

nix/configurations/home/carbon/default.nix

@@ -8,6 +8,9 @@ in
   imports = [
     ./browser.nix
     ./wm.nix
+
+    # system-wide language servers, build tools, compilers
+    ./dev.nix
   ];
 
   home.packages = [
@@ -30,31 +33,14 @@ in
     pkgs.evolution
     pkgs.teams-for-linux
 
-    pkgs.qmk
-    pkgs.wally-cli
-
     myPkgs.typst-mutilate
 
-    pkgs.vscode-fhs
-    pkgs.jetbrains.idea-community
-
     pkgs.prop-solveur
   ];
 
-  programs.java = {
-    enable = true;
-    package = pkgs.jdk17;
-  };
-
   programs = {
     kitty.enable = true;
     password-store.enable = true;
   };
 
-  programs.neovim.extraPackages = [
-    myPkgs.fish-lsp
-
-    pkgs.typescript
-    pkgs.nodePackages.typescript-language-server
-  ];
 }