refactor: rename "server_configurations" => "configs" #3330

Problem:
The name `server_configurations` is extremely verbose and irritatingly
formal and dogmatic. This overlong name is a constant nuisance when
reading, writing, and coding.

It's also not even correct: these configurations are just as much
"client" configurations as they are "server" configurations.

Solution:
- Rename to a shorter name.
- Leave placeholder files for any old URLs that link to the old
  location.

1 files changed, 27 insertions, 0 deletions

diff --git a/lua/lspconfig/configs/erg_language_server.lua b/lua/lspconfig/configs/erg_language_server.lua
new file mode 100644
index 00000000..9b198a8e
--- /dev/null
+++ b/lua/lspconfig/configs/erg_language_server.lua
@@ -0,0 +1,27 @@
+local util = require 'lspconfig.util'
+
+return {
+  default_config = {
+    cmd = { 'erg', '--language-server' },
+    filetypes = { 'erg' },
+    root_dir = function(fname)
+      return util.root_pattern 'package.er'(fname) or util.find_git_ancestor(fname)
+    end,
+  },
+  docs = {
+    description = [[
+https://github.com/erg-lang/erg#flags ELS
+
+ELS (erg-language-server) is a language server for the Erg programming language.
+
+erg-language-server can be installed via `cargo` and used as follows:
+ ```sh
+ cargo install erg --features els
+ erg --language-server
+ ```
+    ]],
+    default_config = {
+      root_dir = [[root_pattern("package.er") or find_git_ancestor]],
+    },
+  },
+}