Map Events to Months and add description.

Find an semi-exhaustive list of events here:
[events.txt](https://github.com/imanishbarnwal/Events-And-Hackathons/files/9724134/events.txt)

Map these events to the months and add proper links and descriptions.

Start with the attached events.txt and inspect the repository’s existing event-list structure before deciding where entries belong. Organize the listed events by month and add a working link and description for each; done means the events are mapped consistently and the resulting collection is complete and readable.

Written by the indexing model from the issue text.