Move lsp config to local file structure

.config/nvim/lsp/fortls.lua

@@ -0,0 +1,27 @@
+---@brief
+---
+--- https://fortls.fortran-lang.org/index.html
+---
+--- fortls is a Fortran Language Server, the server can be installed via pip
+---
+--- ```sh
+--- pip install fortls
+--- ```
+---
+--- Settings to the server can be passed either through the `cmd` option or through
+--- a local configuration file e.g. `.fortls`. For more information
+--- see the `fortls` [documentation](https://fortls.fortran-lang.org/options.html).
+
+---@type vim.lsp.Config
+return {
+  cmd = {
+    'fortls',
+    '--notify_init',
+    '--hover_signature',
+    '--hover_language=fortran',
+    '--use_signature_help',
+  },
+  filetypes = { 'fortran' },
+  root_markers = { '.fortls', '.git' },
+  settings = {},
+}