Merge pull request #133 from maina-m/3.x

Add group by company_id to InvoiceOverview and BillOverview to resolve group by SQL error

app/Filament/Company/Resources/Purchases/BillResource/Widgets/BillOverview.php

             $averagePaymentTime = $this->getPageTableQuery()
                 ->whereNotNull('paid_at')
                 ->selectRaw('AVG(TIMESTAMPDIFF(DAY, date, paid_at)) as avg_days')
+                ->groupBy('company_id')
                 ->value('avg_days');
 
             $averagePaymentTimeFormatted = Number::format($averagePaymentTime ?? 0, maxPrecision: 1);

app/Filament/Company/Resources/Sales/InvoiceResource/Widgets/InvoiceOverview.php

             $averagePaymentTime = $this->getPageTableQuery()
                 ->whereNotNull('paid_at')
                 ->selectRaw('AVG(TIMESTAMPDIFF(DAY, approved_at, paid_at)) as avg_days')
+                ->groupBy('company_id')
                 ->value('avg_days');
 
             $averagePaymentTimeFormatted = Number::format($averagePaymentTime ?? 0, maxPrecision: 1);