Update neovim keybindings & setup ruff lsp

vars/archlinux.yml

@@ -36,7 +36,7 @@ aur_build_dir: '/usr/local/src'
 python_build_dir: '/usr/local/src'
 python_install_dir: '/opt'
 
-# Note that the "python-lsp-server", "python-lsp-ruff" and "neovim" python
+# Note that the "python-lsp-server" and "neovim" python
 # packages should be installed to the corresponding virtualenv as well.
 language_servers:
   - {
@@ -79,6 +79,11 @@ language_servers:
       server_name: 'lua_ls',
       auto_setup: true
     }
+  - {
+      package: ruff-lsp,
+      server_name: 'ruff_lsp',
+      auto_setup: false
+    }
 
 python_download_url: 'https://www.python.org/ftp/python'
 python_versions: