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/bank_transaction_reference.rb

@@ -0,0 +1,32 @@
+class BankTransactionReference
+  # parses a string from a bank transaction field
+  def self.parse(data)
+    m = /(^|[^\w.])FS(?<group>\d+)(\.(?<user>\d+))?(?<parts>([A-Za-z]+\d+(\.\d+)?)+)([^\w.]|$)/.match(data)
+    return unless m
+
+    parts = {}
+    m[:parts].scan(/([A-Za-z]+)(\d+(\.\d+)?)/) do |category, value|
+      value = value.to_f
+      value += parts[category] if parts[category]
+      parts[category] = value
+    end
+
+    ret = { group: m[:group].to_i, parts: parts }
+    ret[:user] = m[:user].to_i if m[:user]
+    ret
+  end
+
+  def self.js_code_for_user(user)
+    %{
+      function(items) {
+        var ret = "FS#{user.ordergroup.id}.#{user.id}";
+        for (var key in items) {
+          if (items.hasOwnProperty(key)) {
+            ret += key + items[key];
+          }
+        }
+        return ret;
+      }
+    }
+  end
+end