feat: add enable and debug to lsp config

This commit adds the following options to the lsp module:
- `enable` allows enabling or disabling the LSP module altogether
- `debug` launches omnisharp in debug mode to allow attaching debugger to the LSP server

lua/csharp/config.lua

@@ -4,6 +4,7 @@ local M = {}
 local default_config = {
   ---@class CsharpConfig.Lsp
   lsp = {
+    enable = true,
     --- @type string?
     cmd_path = "",
     enable_editor_config_support = true,
@@ -15,6 +16,7 @@ local default_config = {
     analyze_open_documents_only = false,
     default_timeout = 1000,
     enable_package_auto_restore = true,
+    debug = false,
   },
   ---@class CsharpConfig.Logging
   logging = {

lua/csharp/lsp.lua

@@ -62,6 +62,10 @@ local function start_omnisharp(args)
     "MsBuild:EnablePackageAutoRestore=" .. tostring(config.enable_package_auto_restore),
   }
 
+  if config.debug then
+    table.insert(cmd, 2, "-d")
+  end
+
   vim.lsp.start({
     name = "omnisharp",
     cmd = cmd,
@@ -72,6 +76,10 @@ local function start_omnisharp(args)
 end
 
 function M.setup()
+  if not config_store.get_config().lsp.enable then
+    return
+  end
+
   local lsp_group = vim.api.nvim_create_augroup("CsharpNvim", { clear = false })
 
   vim.api.nvim_create_autocmd("FileType", {