add zig, specify diagnostic config

lua/init.lua

@@ -31,6 +31,12 @@ local cmp = require("cmp")
       { name = 'buffer' },
     })
   })
+vim.diagnostic.config({
+    virtual_text = true,
+    signs = true,
+    underline = true,
+    float = true,
+})
 
 vim.lsp.config('ts_ls', {})
 vim.lsp.config('clangd', {})
@@ -69,6 +75,7 @@ vim.lsp.config('kotlin-language-server', {
 vim.lsp.config('cmake', {})
 vim.lsp.config('html', {})
 vim.lsp.config('glsl_analyzer', {})
+vim.lsp.config('zls', {})
 
 require'nvim-treesitter.configs'.setup {
   -- Install parsers synchronously (only applied to `ensure_installed`)
@@ -95,6 +102,7 @@ vim.lsp.enable({"cmake"})
 vim.lsp.enable({"html"})
 vim.lsp.enable({"glsl_analyzer"})
 vim.lsp.enable('lua_ls')
+vim.lsp.enable('zls')
 
 vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with(
       vim.lsp.diagnostic.on_publish_diagnostics, {