feat: Tax included (#370)

* feat: Tax included

* Added a toggle switch in tax settings to enable the feature.
* Database migration adding tax_included field into estimates, invoices
  and recurring invoices table.
* Toggle switch to enable and store the tax_included by estimates,
  invoices and recurring invoices.
* In case of tax included enabled, total taxes will be recalculated and
  the invoices, estimates and recurring invoices total won't be sum with
  taxes.
* Apply tax included when discount_per_item/tax_per_item item is enabled.
* Custom component to show the net total when tax included is enabled.
* Update invoice and estimates pdfs with net total.

* chore: Tax included by default

A switch button inside the tax settings to enable the tax included by
default in invoices, estimates and recurring invoices.

database/factories/EstimateFactory.php

@@ -93,6 +93,7 @@ class EstimateFactory extends Factory
                 return $estimate['discount_type'] == 'percentage' ? (($estimate['discount_val'] * $estimate['total']) / 100) : $estimate['discount_val'];
             },
             'tax_per_item' => 'YES',
+            'tax_included' => false,
             'discount_per_item' => 'No',
             'tax' => $this->faker->randomDigitNotNull(),
             'notes' => $this->faker->text(80),