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.

tests/Feature/Admin/InvoiceTest.php

@@ -520,3 +520,20 @@ test('update invoice with EUR currency', function () {
         'base_amount' => $invoice2['taxes'][0]['base_amount'],
     ]);
 });
+
+test('create invoice with tax included', function () {
+    $invoice = Invoice::factory()
+        ->raw([
+            'taxes' => [Tax::factory()->raw()],
+            'items' => [InvoiceItem::factory()->raw()],
+            'tax_included' => true,
+        ]);
+
+    $response = postJson('api/v1/invoices', $invoice);
+
+    $response->assertOk();
+
+    $this->assertDatabaseHas('invoices', [
+        'tax_included' => true,
+    ]);
+});