Added CrowdSourcing App idea

Projects/3-Advanced/crowdsourcing.md

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+# Crowd Sourcing
+
+**Tier:** 3-Advanced
+
+Sometimes Life gets tough and we need support from not only our family and friends but all the good people out there.
+Crowdsourcing has rose as one best option to ask for help from the community.
+
+This webapp aims to provide support to all the needy people.They can start a fundraiser
+on the platform and set one amount raise. 
+People registered on the platform can donate to the user.
+
+## User Stories
+
+-   [ ] User can start a fundraiser
+-   [ ] User can see funds raised so far in real time.
+-   [ ] User can see bank details to donate to the fund.
+-   [ ] A seperate Fund raiser will give extra info to user about fundraiser.
+
+## Bonus features
+
+-   [ ] Implement Transaction facility in the webapp.
+
+## Useful links and resources
+
+[Implementing Payment service](https://web.dev/web-based-payment-apps-overview/)
+
+## Example projects
+
+[Ketto](https://www.ketto.org/)