rewrite and refactor a lot, delete redundant configs

modules/shell/helix.nix

@@ -0,0 +1,39 @@
+{ config, ... }:
+{
+  home-manager.users.jade = { pkgs, ... }: {
+    home = {
+      sessionVariables.EDITOR = "hx";
+      packages = [ 
+        pkgs.nil 
+        pkgs.haskell-language-server
+        pkgs.nodePackages_latest.vscode-html-languageserver-bin 
+        pkgs.nodePackages_latest.vscode-json-languageserver-bin 
+        pkgs.nodePackages_latest.vscode-css-languageserver-bin
+        pkgs.nodePackages_latest.bash-language-server
+      ];
+    };
+    programs.helix = {
+      enable = true;
+      settings = {
+        theme = "gruvbox";
+        editor = {
+          line-number = "relative";
+          lsp.display-messages = true;
+        };
+        keys.normal = {
+          space."=" = ":fmt";
+        };
+      };
+      languages = {
+        "php" = {
+          name = "php";
+          file-types = [ "php" ];
+          language-server = {
+            command = "psalm";
+            args = ["--language-server"];
+          };
+        };
+      };
+    };
+  };
+}