nix: fused redundant devShells into one for carbon

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

nix/configurations/home/carbon/dev.nix

@@ -0,0 +1,64 @@
+{ pkgs, ... }:
+
+let
+  inherit (pkgs) myPkgs;
+in
+
+{
+  home.packages = [
+    # IDEs
+    pkgs.vscode-fhs
+    pkgs.jetbrains.idea-community
+
+    # keyboard
+    pkgs.clang-tools
+    pkgs.qmk
+    pkgs.wally-cli
+
+    # golang
+    pkgs.go
+    pkgs.golangci-lint
+    pkgs.gofumpt
+
+    # typescript
+    pkgs.typescript
+    pkgs.nodejs_20
+
+    # rust
+    pkgs.cargo
+    pkgs.rustc
+    pkgs.rustfmt
+
+    # java
+    pkgs.maven
+
+    pkgs.gnumake
+    pkgs.cmake
+
+    pkgs.iconv
+    pkgs.sqlite
+  ];
+
+  programs.neovim.extraPackages = [
+    # fish
+    myPkgs.fish-lsp
+
+    # golang
+    pkgs.gopls
+    pkgs.golangci-lint-langserver
+
+    # typescript
+    pkgs.nodePackages.typescript-language-server
+
+    # rust
+    pkgs.rust-analyzer
+
+    # java
+    pkgs.jdt-language-server
+  ];
+
+  programs.java = {
+    enable = true;
+    package = pkgs.jdk17.override { enableJavaFX = true; };
+  };
+}