Chirag: Update pagination to be applicable only when specified

[ChiragBellara]

Description

Related PRS (if any):

This backend PR is related to OneCommunityGlobal/HighestGoodNetworkApp#5182 frontend PR.

Main changes explained:

• Updated the GET /events to return all events in default scenarios and paginated results when page and limit are specified.

How to test:

1. check into current branch
2. do npm install and npm run dev to run this PR locally
3. Clear site data/cache
4. log as admin user
5. using Postman try hitting the http://localhost:4500/api/events -> you should see all the events at once
6. again try hitting http://localhost:4500/api/events?page=1&limit=10 -> you should see only the first 10 events.

Screenshots or videos of changes:

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud