[CI] First-time contributor welcome comments and celebration

[leecalcote]

Current Behavior

The community's standard first-time issue / pr welcoming comments and celebration is either missing or disabled.

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Contributor Guides and Resources

• 🛠 Meshery Build & Release Strategy
• 🙋🏾🙋🏼 Questions: Layer5 Discussion Forum and Layer5 Community Slack

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[0xSaksham]

I see no one working on this, should I give it a try?

[senali-d]

@leecalcote I would like to work on this issue