Add CONTRIBUTING.md to casper-network GitHub Org

[devendran-m]

Please consider the following when creating a PR:

Provide a useful description of this PR, suitably verbose, aimed at helping reviewers and contributors

• This PR is created to add CONTRIBUTING.md file to the repository.
• The content of the CONTRIBUTING.md file contains details to the users/community members on how they can contribute, process they have follow when contributing and steps to adhere to during the process.

Update all relevant changelogs

Changelog:

        new file:   profile/CODE_OF_CONDUCT.md
        new file:   profile/CONTRIBUTING.md
        new file:   profile/PROPOSALS.md
        new file:   profile/README.md
        new file:   profile/images/casper_pull_request_flow.png

Provide a link to the GitHub issue relating to this PR

• N/A

Identify if any downstream impact as in to, SDKs, SmartContracts etc

• This is a information document for community members, users and therefore no downstream impact is anticipated.

[devendran-m]

Dear @MParlikar , @sacherjj , @ACStoneCL , @ipopescu ,
I have created this PR to add CONTRIBUTING.md file to the casper-network org as per the direction from Medha. Could you review the content and let me know your comments?

[ipopescu]

Please match the formatting already discussed and updated here.

[ipopescu]

@devendran-m This comment has not been addressed. At the minimum, remove the following heading and incorrect punctuation:

Casper Pull Request Workflow:

Please refer to the Casper Pull Request Workflow below;

[ipopescu]

Should these lines be deleted? They seem to be left over from something and already covered below.

Suggested change

	3. Enhancement Proposals (CEP)
	To propose major changes or enhancements to the Casper Node, we encourage you to submit a Casper Enhancement Proposal (CEP). The CEP process is designed to provide a structured approach to new features, enabling organized discussion and review.

[ipopescu]

Suggested change

	3. **Submit a Pull Request**: Open a PR in the [CEP repository](https://github.com/casper-network/ceps) with your proposal. Ensure you follow all guidelines for submission.
	3. **Submit a Pull Request**: Open a PR in the [CEP repository](https://github.com/casper-network/ceps) with your proposal. Please make sure you follow all submission guidelines.

[ipopescu]

Suggested change

	### 7. Contributing New Projects to Casper Network
	### 7. Contributing New Projects to the Casper Ecosystem

[ipopescu]

The Casper Network is one of the many Casper networks (Mainnet, Testnet, private etc). We need to review the term used here.

Suggested change

	This section is specifically created to explain the mandatory requirements that the Community Developers/Teams are required to follow when contributing new projects to the Casper Network.
	This section is specifically created to explain the mandatory requirements that Community Developers/Teams must follow when contributing new projects to the Casper Ecosystem.

[devendran-m]

Hi @ipopescu ,
Thank you for your feedback. I have incorporated the comments. Please review and provide your approval if everything is okay.

[ipopescu]

@devendran-m, many of my comments have not been addressed and are still in an unresolved state.
Also, the diagram is still incorrect and not representative of the casper branching strategy. Please update it or remove it until it gets updated.
Let me know if you need help with the editing updates and I will make them directly.