Refactor printing logic across multiple scripts to use method chaining for improved readability and consistency

- Updated Printer and PrinterPos instantiation to use method chaining with addParam instead of add_param.
- Refactored print functions in various modules including opname.js, pos.js, tukar.js, ppobtx.js, prabayar.js, and multiple report scripts.
- Enhanced code clarity and maintainability by standardizing parameter addition for print jobs.

app/Scripts/inv/pos.js

@@ -35,16 +35,15 @@ var POSJS = {
     },
 
     proses_oc() {
-        var cetak = new PrinterPos('report/nota/open_cash');
-        cetak.exec();
+        new PrinterPos('report/nota/open_cash').exec();
         $('#Nama_Produk').focus();
     },
 
     proses_print(oc) {
-        var cetak = new PrinterPos('report/nota/pos');
-        cetak.add_param("Nomor_Cetak", $('#No_Cetak').val());
-        cetak.add_param("Open_Cash", oc);
-        cetak.exec();
+        new PrinterPos('report/nota/pos')
+            .addParam("Nomor_Cetak", $('#No_Cetak').val())
+            .addParam("Open_Cash", oc)
+            .exec();
     },
 
     proses_cancel() {