fix: type annotations and type errors

lua/oil/view.lua

@@ -476,6 +476,7 @@ M.format_entry_cols = function(entry, column_defs, col_width, adapter)
   for i, column in ipairs(column_defs) do
     local chunk = columns.render_col(adapter, column, entry)
     local text = type(chunk) == "table" and chunk[1] or chunk
+    ---@cast text string
     col_width[i + 1] = math.max(col_width[i + 1], vim.api.nvim_strwidth(text))
     table.insert(cols, chunk)
   end