Add SDK low-effort PR examples document

[El-swaggerito]

Description

Difficulty: Hard

Type: Documentation

Summary

Document examples of SDK PRs that are unlikely to satisfy evaluation standards.

Current Behaviour

Contributors may not understand why a small merged PR may still be considered insufficient.

Expected Behaviour

The repo should show examples of incomplete, superficial, under-tested, and failing-CI contributions.

Suggested Implementation

Create examples document with improved alternatives and review notes.

Files or Areas Likely Affected

• docs/
• README.md

Acceptance Criteria

• Low-effort PR examples are documented.
• Under-tested examples are included.
• Failing-CI examples are included.
• Improved alternatives are shown.
• Tone remains constructive.
• README links to the document.

Additional Notes

This turns the campaign warning into practical guidance.