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/EstimateTest.php

@@ -463,3 +463,23 @@ test('update estimate with EUR currency', function () {
 
     $response->assertStatus(200);
 });
+
+test('create estimate with tax included', function () {
+    $estimate = Estimate::factory()->raw([
+        'estimate_number' => 'EST-000006',
+        'items' => [
+            EstimateItem::factory()->raw(),
+        ],
+        'taxes' => [
+            Tax::factory()->raw(),
+        ],
+        'tax_included' => true,
+    ]);
+
+    postJson('api/v1/estimates', $estimate)
+        ->assertStatus(201);
+
+    $this->assertDatabaseHas('estimates', [
+        'tax_included' => $estimate['tax_included'],
+    ]);
+});