Major lsp overhaul. Use new 0.11+ apis, remove lspconfig, remove lots of

mason/lspconfig util plugins. Currently supports following lsps: gopls,
clangd, lua-language-server, cmake-language-server

home/.config/nvim/lua/language_servers/gopls.lua

@@ -1,12 +1,56 @@
+local mod_cache = nil
+
 return {
-    merge_with_default = true,
+    cmd = { "gopls" },
+    filetypes = { "go", "gomod", "gowork", "gotmpl" },
     settings = {
         gopls = {
             ["ui.inlayhints.hints"] = {
                 compositeLiteralFields = true,
                 constantValues = true,
-                parameterNames = true
-            }
+                parameterNames = true,
+            },
+            analyses = {
+                unusedparams = true,
+            },
+            staticcheck = true,
+            lintTool = "golangci-lint",
         },
-    }
+    },
+    root_dir = function(callback)
+        local path = vim.fn.expand("%:p")
+        if not path or path == "" then
+            callback(nil)
+            return
+        end
+
+        -- Asynchronously fetch GOMODCACHE if not already set
+        if not mod_cache then
+            vim.system({ "go", "env", "GOMODCACHE" }, { text = true }, function(result)
+                if result and result.code == 0 and result.stdout then
+                    mod_cache = vim.trim(result.stdout)
+                else
+                    vim.notify("[gopls] Unable to fetch GOMODCACHE", vim.log.levels.WARN)
+                    mod_cache = nil
+                end
+            end)
+        end
+
+        -- Check if the file is in the module cache
+        if mod_cache and path:sub(1, #mod_cache) == mod_cache then
+            local clients = vim.lsp.get_clients({ name = "gopls" })
+            if #clients > 0 then
+                callback(clients[#clients].config.root_dir)
+                return
+            end
+        end
+
+        -- Fallback: Find project root markers
+        local go_mod_root = vim.fs.find({ "go.work", "go.mod", ".git" }, { upward = true, path = path })[1]
+        if go_mod_root then
+            callback(vim.fs.dirname(go_mod_root))
+        else
+            callback(nil)
+        end
+    end,
 }