Release v8.8.4

• Additional GST related fields in Invoice and Sales/Purchase Register reort (#10405)
• Tax rate in Itemised sales/purchase register and cleanups (#10439)
• [Fix] Making of production order from so, system not fetched the items from the sales order item if packing list has items and vice versa (#10453)
• [Fix] Tax rule is not working for the parent customer groups (#10458)
• [hotfix] fixed the mysql syntax error issue on stock ledger report (#10442)
• [hotfix] fixed mysql syntax error in Student and Guardian Contact Details report (#10450)
• [hotfix] fixed type in gst_state_code_data.json file (#10437)
• [Fix] Due date not fetching on the payment entry against the invoices (#10419)
• [hotfix] fixes for #9782 calculate leave without pay before subtracting holidays (#10355)
• [fix] Update monthly sales value on Company (#10417)
• remove empty first row if needed (#10378)
• Transaction Forms (Payment Entry, Sales Invoice, Purchase Invoice) can forget company currency (#10409) (#10410)