Move lsp config to local file structure

.config/nvim/lsp/terraformls.lua

@@ -0,0 +1,40 @@
+---@brief
+---
+--- https://github.com/hashicorp/terraform-ls
+---
+--- Terraform language server
+--- Download a released binary from https://github.com/hashicorp/terraform-ls/releases.
+---
+--- From https://github.com/hashicorp/terraform-ls#terraform-ls-vs-terraform-lsp:
+---
+--- Both HashiCorp and the maintainer of terraform-lsp expressed interest in
+--- collaborating on a language server and are working towards a _long-term_
+--- goal of a single stable and feature-complete implementation.
+---
+--- For the time being both projects continue to exist, giving users the
+--- choice:
+---
+--- - `terraform-ls` providing
+---   - overall stability (by relying only on public APIs)
+---   - compatibility with any provider and any Terraform >=0.12.0 currently
+---     less features
+---   - due to project being younger and relying on public APIs which may
+---     not offer the same functionality yet
+---
+--- - `terraform-lsp` providing
+---   - currently more features
+---   - compatibility with a single particular Terraform (0.12.20 at time of writing)
+---     - configs designed for other 0.12 versions may work, but interpretation may be inaccurate
+---   - less stability (due to reliance on Terraform's own internal packages)
+---
+--- Note, that the `settings` configuration option uses the `workspace/didChangeConfiguration` event,
+--- [which is not supported by terraform-ls](https://github.com/hashicorp/terraform-ls/blob/main/docs/features.md).
+--- Instead you should use `init_options` which passes the settings as part of the LSP initialize call
+--- [as is required by terraform-ls](https://github.com/hashicorp/terraform-ls/blob/main/docs/SETTINGS.md#how-to-pass-settings).
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'terraform-ls', 'serve' },
+  filetypes = { 'terraform', 'terraform-vars' },
+  root_markers = { '.terraform', '.git' },
+}