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/report/jual/jual.js

@@ -21,23 +21,23 @@ var RepoJualJS = {
     },
 
     proses_print(prt) {
-        var cetak = new Printer(this.PHP + '/print');
-        cetak.add_param("Tipe");
-        cetak.add_param("CabID");
-        cetak.add_param("MemberID");
-        cetak.add_param("Tgl_From");
-        cetak.add_param("Tgl_To");
+        let cetak = new Printer(this.PHP + '/print')
+            .addParam("Tipe")
+            .addParam("CabID")
+            .addParam("MemberID")
+            .addParam("Tgl_From")
+            .addParam("Tgl_To");
         if (prt) cetak.doPrint(); else cetak.doPreview();
     },
 
     proses_dload() {
-        var dload = new Download(this.PHP + '/excel');
-        dload.addParam("Tipe");
-        dload.addParam("CabID");
-        dload.addParam("MemberID");
-        dload.addParam("Tgl_From");
-        dload.addParam("Tgl_To");
-        dload.download();
+        new Download(this.PHP + '/excel')
+            .addParam("Tipe")
+            .addParam("CabID")
+            .addParam("MemberID")
+            .addParam("Tgl_From")
+            .addParam("Tgl_To")
+            .download();
     }
 
 };