Move lsp config to local file structure

.config/nvim/lsp/dolmenls.lua

@@ -0,0 +1,15 @@
+---@brief
+---
+--- https://github.com/Gbury/dolmen/blob/master/doc/lsp.md
+---
+--- `dolmenls` can be installed via `opam`
+--- ```sh
+--- opam install dolmen_lsp
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'dolmenls' },
+  filetypes = { 'smt2', 'tptp', 'p', 'cnf', 'icnf', 'zf' },
+  root_markers = { '.git' },
+}