feat: Merge LSP workspace settings with default ones

Instead of just override the entire Neovim's LSP server settings with
new ones from the workspace, merge new settings with existing ones.

nvim/lua/lsp_server_settings.lua

@@ -1,10 +1,22 @@
+local function table_merge(t1, t2)
+    for k, v in pairs(t2) do
+        if (type(v) == "table") and (type(t1[k] or false) == "table") then
+            table_merge(t1[k], t2[k])
+        else
+            t1[k] = v
+        end
+    end
+    return t1
+end
+
 local settings = {}
 
 settings.pylsp = require("python_lsp_server_settings")
 
 local workspace_settings_file = vim.fn.findfile(".nvim/lsp-server-settings.lua", ".;")
 if workspace_settings_file ~= "" then
-    settings = dofile(workspace_settings_file)
+    workspace_settings = dofile(workspace_settings_file)
+    settings = table_merge(settings, workspace_settings)
 end
 
 return settings

nvim/lua/workspace_sample/lsp-server-settings.lua

@@ -0,0 +1,13 @@
+local settings = {}
+settings.pylsp = {
+    plugins = {
+        flake8 = {maxLineLength = 120},
+        pylint = {
+            args = {
+                "--max-line-length=120",
+                "--disable=missing-docstring,invalid-name,redefined-outer-name,logging-format-interpolation"
+            }
+        },
+    }
+}
+return settings