feat: switch to native 0.11 LSP, remove obsolete things

lsp/lua.lua

@@ -0,0 +1,14 @@
+---@type vim.lsp.Config
+return {
+    cmd = { "lua-language-server" },
+    filetypes = { "lua" },
+    root_markers = { ".luarc.json", ".luarc.jsonc" },
+    telemetry = { enabled = false },
+    settings = {
+        Lua = {
+            runtime = {
+                version = "LuaJIT",
+            },
+        },
+    },
+}