Docs/add contributing guide

[Nareshkumawat-star]

Summary

This Pull Request introduces a comprehensive CONTRIBUTING.md guide in the repository root to help new contributors set up the project locally, understand the monorepo architecture, follow branch naming conventions, and adhere to PR quality checklists. Additionally, it fixes a bug in the backend GET /api/events/:slug endpoint that was causing a test failure by exposing the missing organizerId field in the response.

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#Closes : #619

Type of Change

• Bug fix
• New feature
• Refactor (no functional change)
• UI / Design change
• Tests only
• Documentation
• Infrastructure / DevOps
• Security

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What Changed

• CONTRIBUTING.md (root): Added a new structured contributing guide containing a monorepo project overview, prerequisite software requirements, step-by-step local setup guide, branch naming conventions (feat/, fix/, docs/, chore/), PR quality checklist, and an issue labels guide.
• apps/backend/src/routes/event.ts: Modified the EventDetails type and updated the GET /:slug endpoint response mapping to include organizerId: details.organizerId. This resolves the assertion error in the backend test suite where organizerId was received as undefined.
• Other codebase alignments: Staged and committed local typescript formatting and import cleanups (such as migrating to node:crypto imports) to ensure they are tracked.

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How to Test

1. Run the backend Vitest test suite to verify that all 293 tests (including the previously failing event details tests) pass successfully:

   npm run test

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[github-actions]

Hi @Nareshkumawat-star,

Thanks for opening this pull request.

This PR has been automatically classified based on the files modified.

Applied Labels

• gssoc:approved
• backend
• web

Primary Review Area

• backend

Reviewer

@Harxhit has been identified as the primary reviewer for this pull request.

If you have any questions regarding the affected area or implementation details, feel free to reach out to the assigned reviewer.

Thank you for your contribution!

[github-actions]

CI — All Checks Passed

Backend — PASS

Check	Result
Lint	PASS
Test	PASS
Typecheck	PASS

Mobile — SKIP

Check	Result
Lint	-
Test	-

Web — PASS

Check	Result
Build	PASS

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Last updated: Wed, 15 Jul 2026 16:07:53 GMT

[ShantKhatri]

This PR is deviated from the issue. Closing this one.