feat(api): Add pagination metadata to Event module

[muntaxir4]

Description

• Add support for paginated response for getEvents() of event.service.ts under API.
• Add and improve relevant test cases.
• Modify event variable's value in affected modules' e2e, where state of events are queried.

Fixes #344

Also, Fixes #336 after merging this and #382 #387 #388 #389 #390 #391 #393.

Dependencies

N/A

Future Improvements

N/A

Screenshots of relevant screens

Extra test:

Developer's checklist

• [x] My PR follows the style guidelines of this project
• [x] I have performed a self-check on my work

If changes are made in the code:

• [x] I have followed the coding guidelines
• [x] My changes in code generate no new warnings
• [ ] My changes are breaking another fix/feature of the project
• [x] I have added test cases to show that my feature works
• [x] I have added relevant screenshots in my PR
• [x] There are no UI/UX issues

Documentation Update

• [ ] This PR requires an update to the documentation at docs.keyshade.xyz
• [x] I have made the necessary updates to the documentation, or no documentation changes are required.

[codiumai-pr-agent-free[bot]]

Failed to generate code suggestions for PR

[muntaxir4]

/describe The bot is asleep ig :disappointed:

[codiumai-pr-agent-free[bot]]

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