chore: add new 5 online/offline events to the TechNexus

[pawarspeaks]

Open for all contributors – No need to be assigned. You can directly raise a pull request (PR).

Instructions:
PR Title: Use the title "chore: added new online/offline events".
Conciseness: Ensure that the JSON files are concise with only the essential details.
Correct Image URLs: Double-check that all image URLs are valid and accurately point to the correct images.
No Duplicates: Make sure not to add duplicate events already listed.
Formatting: Follow consistent JSON formatting with proper indentation and structure.
Feel free to contribute and raise a PR for the event data.

[shahzdvp]

i would like to contribute for this

[pawarspeaks]

i would like to contribute for this

You can start with it!