Move lsp config to local file structure

.config/nvim/lsp/slint_lsp.lua

@@ -0,0 +1,24 @@
+---@brief
+---
+--- https://github.com/slint-ui/slint
+--- `Slint`'s language server
+---
+--- You can build and install `slint-lsp` binary with `cargo`:
+--- ```sh
+--- cargo install slint-lsp
+--- ```
+---
+--- Vim does not have built-in syntax for the `slint` filetype at this time.
+---
+--- This can be added via an autocmd:
+---
+--- ```lua
+--- vim.cmd [[ autocmd BufRead,BufNewFile *.slint set filetype=slint ]]
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'slint-lsp' },
+  filetypes = { 'slint' },
+  root_markers = { '.git' },
+}