Superadmin file changes

Every location will have single entry in DB, we can define multiple contexts now.

Admin will have only one location with multiple contexts
addStock.php : insertion admin id into stock table
getrequest.php : added a function to fetch asset code
processrequest.php: insertion admin id into stock table  +asset code insertion into product table
mail_sender.php : made changes to mail functions please set HOD email id  in this file find for $hod_mail
stock.js : admin id
processor_for_user.php : insertion receivers manager mail into transfer request table.
tresponse.php : fixed mail response for transfer request, was showing error at that time of testing as both employee id/username should be available in employee table too else mail will not work properly.

userassetForm.php : tried to auto populate the asset code on serial selection but serail numbers are not populating that was done earlier ,please look into it!
 chk mail for sql.

Signed-off-by: himanshu saini <him.developer@gmail.com>
Merge branch 'HZ-himanshu' into HZ-main