Add hierarchy 'breadcrumbs' to docs

Description

Contributor guide

Tech stack

None

Domain

documentation

Issue type

documentation

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

2

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-3 hours

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

Basic knowledge of HTML/CSSFamiliarity with Akka HTTP documentation structureUnderstanding of breadcrumb navigation patterns

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

70

Research direction

Examine the existing documentation structure in the akka http repository, likely under a 'docs' directory. Look for the template or layout files that generate the HTML pages (e.g., using Play or Markdown). The issue references specific URLs showing the current lack of breadcrumbs. Identify where breadcrumbs should be inserted in the page template, and propose adding a simple breadcrumb trail based on the URL hierarchy. Check if the left panel navigation already provides hierarchy data that could be reused. Consider using a CSS only approach to keep changes minimal.