fix: nixd option groups and documentation page (#4594)

* Nix autocompletion options

* Support for formatting with nixd

* Revert nixd lsp name

* Fix nixd option groups

* Fixed documentation pages for nixd and rnix

* fix: use backticks for nixd documentation examples

Author: breitnw

clients/lsp-nix.el

@@ -57,7 +57,7 @@
 (lsp-defcustom lsp-nix-nixd-formatting-command nil
   "External formatter command with arguments.
 
-  Example: [ \"nixpkgs-fmt\" ]"
+  Example: `[\"nixpkgs-fmt\"]`"
   :type 'lsp-string-vector
   :group 'lsp-nix-nixd
   :lsp-path "nixd.formatting.command"
@@ -70,30 +70,30 @@
   Resource Usage: Entries are lazily evaluated, entire nixpkgs takes 200~300MB
   for just \"names\". Package documentation, versions, are evaluated by-need.
 
-  Example: \"import <nixpkgs> { }\""
+  Example: `\"import <nixpkgs> { }\"`"
   :type 'string
   :group 'lsp-nix-nixd
   :lsp-path "nixd.nixpkgs.expr"
   :package-version '(lsp-mode . "9.0.1"))
 
 (lsp-defcustom lsp-nix-nixd-nixos-options-expr nil
   "Option set for NixOS option completion. If this is omitted, the default
-  search path (<nixpkgs>) will be used.
+  search path (`<nixpkgs>`) will be used.
 
   Example:
-  \"(builtins.getFlake \"/home/lyc/flakes\").nixosConfigurations.adrastea.options\""
+  `\"(builtins.getFlake \"/home/lyc/flakes\").nixosConfigurations.adrastea.options\"`"
   :type 'string
-  :group 'lsp-nix-nil
+  :group 'lsp-nix-nixd
   :lsp-path "nixd.options.nixos.expr"
   :package-version '(lsp-mode . "9.0.1"))
 
 (lsp-defcustom lsp-nix-nixd-home-manager-options-expr nil
   "Option set for home-manager option completion.
 
   Example:
-  \"(builtins.getFlake \"/home/lyc/flakes\").nixosConfigurations.adrastea.options\""
+  `\"(builtins.getFlake \"/home/lyc/flakes\").nixosConfigurations.adrastea.options\"`"
   :type 'string
-  :group 'lsp-nix-nil
+  :group 'lsp-nix-nixd
   :lsp-path "nixd.options.home-manager.expr"
   :package-version '(lsp-mode . "9.0.1"))
 

docs/lsp-clients.json

@@ -710,15 +710,15 @@
     "debugger": "Not available"
   },
   {
-    "name": "nix",
+    "name": "nix-nixd",
     "full-name": "Nix (nixd language server)",
     "server-name": "nixd",
     "server-url": "https://github.com/nix-community/nixd",
     "installation": "nix profile install github:nixos/nixpkgs#nixd",
     "debugger": "Not available"
   },
   {
-    "name": "nix",
+    "name": "nix-rnix",
     "full-name": "Nix (rnix language server)",
     "server-name": "rnix-lsp",
     "server-url": "https://github.com/nix-community/rnix-lsp",