Adding Contributors Guide to the Readme of the repository

Being an open source project, we look forward to contributors from across the world. For that we have outlined few changes which will make it easier for contributors to navigate through the project with more ease, and quickly develop a better understanding of the working of different components of Hyperswitch.
<think>
PR Context:
- Title: docs: upload new logos
- Merged: 2024-10-18T14:34:22Z
- Files changed: 5 files
- Commits: 9 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [x] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->

Closes - #5175 
### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

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