mohammed firdous

PipeCD - Enhanced Contributing Guidelines

Expanded PipeCD's contribution documentation covering community engagement, development setup, and PR processes to help new contributors get started.

I expanded PipeCD’s contributing docs to make onboarding clearer for first-time contributors.

The update added practical guidance on where to ask questions, how to set up a local dev environment, and how to structure PRs for faster review.

I shipped this across multiple docs files and aligned wording/structure in both docs-dev and docs-v1.0.x.

This reduced ambiguity in the contribution path and was merged after maintainer iterations.

Links: PR #6399Issue #6124