Use fetchApiSingleton to fetch data from Projects API

[starboi02]

Issue Description

• In the MainActivity create a method named getProjectData to use the fetchApiSingleton instance for fetching data from the API https://raw.githubusercontent.com/opencodeiiita/Collaborative-Web/main/data/projects.json.
• Create a toast for the error response.
• Create an ArrayList of the Project object from the json response.
• Make getProjectData() return ArrayList<Project>.

Note

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[raghavgoel25]

claim

[starboi02]

@raghavgoel25 what's the progress? It has been 3 days.

[raghavgoel25]

I'll be making a PR soon sir.