Improve onboarding & examples for chrome-devtools-mcp

[sharkello]

Title: Improve onboarding & examples for chrome-devtools-mcp

Summary

Adds IMPROVEMENTS.md with concrete suggestions to improve discoverability and onboarding: TL;DR, quickstart, and good‑first issues.

What changed

• Added IMPROVEMENTS.md with a one‑line TL;DR, suggested examples, and good‑first‑issue templates.

How to test

• Review IMPROVEMENTS.md in the repo root. Validate suggestions are clear and actionable.

Risk

Low — documentation only.

Notes

I can prepare the example files and open a PR with these changes applied directly to README and examples if you want me to push and create PRs.

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