nvim config updates

.config/nvim/lua/config/options.lua

@@ -35,4 +35,28 @@ vim.o.timeoutlen = 300
 vim.o.splitbelow = true
 vim.o.splitright = true
 
-vim.diagnostic.config({ virtual_text = true })
+vim.diagnostic.config({
+    virtual_text = true,
+    signs = true,
+    virtual_lines = false,
+    update_in_insert = true,
+    float = {
+        source = 'if_many',
+        format = function(d)
+            return ("[%d:%d] %s"):format(
+                d.lnum + 1,
+                d.end_col + 1,
+                d.message
+            )
+        end,
+    }
+})
+
+-- fold related stuff
+vim.o.foldcolumn = '0'
+vim.o.foldlevel = 99
+vim.o.foldlevelstart = 99
+vim.o.foldenable = true
+
+-- spelling
+vim.o.spelllang = 'en,ru'