Move lsp config to local file structure

.config/nvim/lsp/svlangserver.lua

@@ -0,0 +1,42 @@
+---@brief
+---
+--- https://github.com/imc-trading/svlangserver
+---
+--- Language server for SystemVerilog.
+---
+--- `svlangserver` can be installed via `npm`:
+---
+--- ```sh
+--- $ npm install -g @imc-trading/svlangserver
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'svlangserver' },
+  filetypes = { 'verilog', 'systemverilog' },
+  root_markers = { '.svlangserver', '.git' },
+  settings = {
+    systemverilog = {
+      includeIndexing = { '*.{v,vh,sv,svh}', '**/*.{v,vh,sv,svh}' },
+    },
+  },
+  on_attach = function(client, bufnr)
+    vim.api.nvim_buf_create_user_command(bufnr, 'LspSvlangserverBuildIndex', function()
+      client:exec_cmd({
+        title = 'Build Index',
+        command = 'systemverilog.build_index',
+      }, { bufnr = bufnr })
+    end, {
+      desc = 'Instructs language server to rerun indexing',
+    })
+    vim.api.nvim_buf_create_user_command(bufnr, 'LspSvlangserverReportHierarchy', function()
+      client:exec_cmd({
+        title = 'Build Index',
+        command = 'systemverilog.build_index',
+        arguments = { vim.fn.expand '<cword>' },
+      }, { bufnr = bufnr })
+    end, {
+      desc = 'Generates hierarchy for the given module',
+    })
+  end,
+}