rails up to 7.0and ruby to 2.7.2

mv lib to app/lib due to upgrade

removing concerns from autoload path

resolve zeitwerk issues

make foodsoft run for dev on rails 7 and ruby 2.7

fix mail file permission bug

fix database_config

fix articles controller test ActiveModell::Error

bump Gemfile.lock

app/lib/render_csv.rb

@@ -0,0 +1,44 @@
+require 'csv'
+
+class RenderCsv
+  include ActionView::Helpers::NumberHelper
+
+  def initialize(object, options = {})
+    @object = object
+    @options = options
+    # defaults to please Microsoft Excel ...
+    @options[:col_sep] ||= FoodsoftConfig[:csv_col_sep] || ';'
+    @options[:row_sep] ||= FoodsoftConfig[:csv_row_sep] if FoodsoftConfig[:csv_row_sep]
+    @options[:encoding] ||= FoodsoftConfig[:csv_encoding] || 'ISO-8859-15'
+  end
+
+  def to_csv
+    options = @options.select { |k| %w(col_sep row_sep).include? k.to_s }
+    ret = CSV.generate options do |csv|
+      if h = header
+        csv << h
+      end
+      data { |d| csv << d }
+    end
+    ret.encode(@options[:encoding], invalid: :replace, undef: :replace)
+  end
+
+  def header
+    nil
+  end
+
+  def data
+    yield []
+  end
+
+  # Helper method to test pdf via rails console: OrderCsv.new(order).save_tmp
+  def save_tmp
+    encoding = @options[:encoding] || 'UTF-8'
+    File.write("#{Rails.root}/tmp/#{self.class.to_s.underscore}.csv", to_csv.force_encoding(encoding))
+  end
+
+  # XXX disable unit to avoid encoding problems, both in unit and whitespace. Also allows computations in spreadsheet.
+  def number_to_currency(number, options = {})
+    super(number, options.merge({ unit: '' }))
+  end
+end