improve receipt/details reports and implement number formatting

1) eager load reports for receipt/details
2) introduce number_format lookups to replace print_settings for number formatting
3) implement NumberFormattable concern, reference number_format lookups or print_settings if not exist, to get number format settings and number formatting
4) replace rails NumberHelper.number_with_precision with NumberFormattable.number_format hopefully to reduce overhead, formatting numbers for huge lists of data

README.md

@@ -279,6 +279,15 @@ For Food Court Settings On/Off
 	** '0' means can not use food court and '1' means can use food court **
 	=> settings/lookups => { type:food_court, name: FoodCourt, value:'{0 or 1}' }
 
+For Number Formats
+	Precision
+	=> settings/lookups => { lookup_type: number_format, name: precision, value: {0..2} }
+	Delimiter
+	=> settings/lookups => { lookup_type: number_format, name: delimiter, value: { ',', '\u0020', '', ... }
+	Strip insignificant zeros
+	=> settings/lookups => { lookup_type: number_format, name: strip_insignificant_zeros,
+		 value: {true: => ['1', 't', 'true', 'on', 'y', 'yes'], false: => ['0', 'f', 'false', 'off', 'n', 'no', ...] }
+
 /* Customer Types in lookups */
 1) settings/lookups => { type:customer_type, name: Dinein, value:Dinein }
 2) settings/lookups => { type:customer_type, name: Takeaway, value: Takeaway }