Add an option on the landing page to create dummy fact checks for quick exploration

[deshetti]

For folks who want to quickly install and explore the tool, it might be beneficial to have an option on the landing page to install dummy data. Needless to say, clicking on the button should install the dummy data defined in the data files here

• Add sample json files for dummy data
• Option of adding dummy data should be only available when the instance doesn't have any fact-checks, ratings, claimants
• Create an env param, INSTALL_DUMMY_DATA which automatically installs dummy data during the startup if there is no existing data for the entities: fact-checks, ratings, claimants

[hetjagani]

@shreeharsha-factly or @deshetti can one of you send me what all dummy data we want to store on install.