feat: Add Workflow Documentation Guide (hiero-ledger#1772)

Signed-off-by: jona42-ui <jonathanthembo123@gmail.com>
Signed-off-by: Thembo Jonathan <jonathanthembo123@gmail.com>

Author: jona42-ui

CHANGELOG.md

@@ -30,6 +30,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 - Reverted PR #1739 checking assignment counts
 - chore: update step-security/harden-runner from 2.14.1 to 2.14.2 in a workflow
 - Redesigned beginner issue template with readiness self-check, exploration-based task structure, compact workflow reference, and common pitfalls guidance to improve completion rates (#1651)
+- Added workflow documentation guide (`docs/github/04_workflow_documentation.md`) with best practices for documenting GitHub workflows and automation scripts (#1745)
 
 ## [0.2.0] - 2026-11-02