fix sign, fix terminal tab, switch csharp lsp

lua/config/settings.lua

@@ -32,7 +32,7 @@ else
 end
 
 -- diagnostics
-local signs = { Error = " ", Warn = " ", Hint = " ", Info = " " }
+local signs = { Error = " ", Warn = " ", Hint = "", Info = " " }
 for type, icon in pairs(signs) do
     local hl = "DiagnosticSign" .. type
     vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = hl })