feat: Add Moon Books app

apps/moonbooks/moonbooks.yml

@@ -0,0 +1,20 @@
+name: Moon Books
+description:
+  'Easy Receipt & Bill Maker App is an ideal invoice generator for small business owners, contractors, and freelancers. Our free billing software allows the creation of free bills, estimates, receipts, purchase orders, and credit notes with a single tap! It is most likely for the hospitality industry, retailers, and other utility agencies to generate quick bills using our bill and receipt generator app. Whether tracking expenses, receiving online payments, or creating bills using readymade templates, we provide it all under a single hat with our easy receipt & bill maker app.'
+website: 'https://www.mooninvoice.com/invoice-software-for-mac'
+category: 'Business'
+keywords:
+  - finance
+  - manager
+  - account
+  - online
+  - payment
+  - reminder
+  - small
+  - business
+  - tracker
+  - money
+  - pay
+  - manage
+  - book
+  - keeping