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/financial_transactions_csv.rb

@@ -0,0 +1,33 @@
+require 'csv'
+
+class FinancialTransactionsCsv < RenderCsv
+  include ApplicationHelper
+
+  def header
+    [
+      FinancialTransaction.human_attribute_name(:created_on),
+      FinancialTransaction.human_attribute_name(:ordergroup),
+      FinancialTransaction.human_attribute_name(:ordergroup),
+      FinancialTransaction.human_attribute_name(:user),
+      FinancialTransaction.human_attribute_name(:financial_transaction_class),
+      FinancialTransaction.human_attribute_name(:financial_transaction_type),
+      FinancialTransaction.human_attribute_name(:note),
+      FinancialTransaction.human_attribute_name(:amount)
+    ]
+  end
+
+  def data
+    @object.includes(:user, :ordergroup, :financial_transaction_type).each do |t|
+      yield [
+        t.created_on,
+        t.ordergroup_id,
+        t.ordergroup_name,
+        show_user(t.user),
+        t.financial_transaction_type.financial_transaction_class.name,
+        t.financial_transaction_type.name,
+        t.note,
+        number_to_currency(t.amount)
+      ]
+    end
+  end
+end