Add dashboard widget to show the latest notes. Issue #51

p.s: I would like to be able to select a particular tag to show, but
none of the dashboard widgets are configurable.

I hate increasing the app size from 300k to almost 3 mb for something
so simple, but we must adapt to the majority and use vue here.

lib/AppInfo/DashboardWidget.php

@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\QuickNotes\AppInfo;
+
+use OCP\Dashboard\IWidget;
+use OCP\IL10N;
+use OCP\IURLGenerator;
+
+class DashboardWidget implements IWidget {
+
+	private IURLGenerator $url;
+	private IL10N $l10n;
+
+	public function __construct(IURLGenerator $url,
+	                            IL10N         $l10n)
+	{
+		$this->url = $url;
+		$this->l10n = $l10n;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getId(): string {
+		return 'quicknotes';
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getTitle(): string {
+		return $this->l10n->t('Quick notes');
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getOrder(): int {
+		return 30;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getIconClass(): string {
+		return 'icon-quicknotes';
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getUrl(): ?string {
+		return $this->url->linkToRouteAbsolute('quicknotes.page.index');
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function load(): void {
+		\OCP\Util::addScript('quicknotes', 'quicknotes-dashboard');
+	}
+}