feat: add cypher language server

lua/lspconfig/server_configurations/cypher_ls.lua

@@ -0,0 +1,23 @@
+local util = require 'lspconfig.util'
+
+return {
+  default_config = {
+    cmd = { 'cypher-language-server', '--stdio' },
+    filetypes = { 'cypher' },
+    root_dir = util.find_git_ancestor,
+    single_file_support = true
+  },
+  docs = {
+    description = [[
+https://github.com/neo4j/cypher-language-support/tree/main/packages/language-server
+
+`cypher-language-server`, language server for Cypher query language.
+Part of the umbrella project cypher-language-support: https://github.com/neo4j/cypher-language-support
+
+`cypher-language-server` can be installed via `npm`:
+```sh
+npm i -g @neo4j-cypher/language-server
+```
+]],
+  },
+}