Add Nextflow training collection

[GiorgiaMori]

Adding the Australian BioCommons Nextflow training collection

[Copilot]

🟡 Changes recommended

Existing resources and the /nextflow route may be lost, with additional metadata and accessibility issues remaining.

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Pull request overview

Adds an Australian BioCommons Nextflow training collection with curated learning resources.

Changes:

• Adds a card-based training collection.
• Updates sidebar navigation.
• Replaces the previous Nextflow page and resource entries.

File summaries

File	Summary
pages/nextflow.md	Removes the previous collection page.
pages/nextflow_training.md	Adds the new training collection layout.
_data/sidebars/main.yml	Updates navigation to the new collection.
_data/all_content_list.yml	Adds training metadata and replaces existing Nextflow entries.

Review details

Suppressed comments (3)

_data/sidebars/main.yml:15

• Replacing the existing /nextflow sidebar target with /nextflow_training removes the public /nextflow route because pages use /:basename permalinks. Existing bookmarks or external links to the current collection will therefore return 404; please retain a compatibility redirect/page for /nextflow while exposing the renamed collection.

        url: /nextflow_training

pages/nextflow_training.md:59

• The preceding Markdown heading already receives the training-materials slug in Jekyll/Kramdown, so this wrapper creates a duplicate HTML id. Duplicate IDs make the tile anchor target ambiguous; remove the wrapper id and let the heading provide the anchor.

<div class="row row-cols-1 row-cols-md-2 g-4 mb-5" id="training-materials">

pages/nextflow_training.md:75

• Every card exposes the same link name, Open resource; screen-reader users navigating a links list cannot distinguish the destinations. Add the resource name to the link's accessible name while retaining the visible label.

						<a href="{{ resource.url }}">Open resource</a>

• Files reviewed: 4/4 changed files
• Comments generated: 5
• Review effort level: Lite

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[burkemlou]

To check with Rahul (not necessarily right now but certainly sooner rather than later):

Is content in tiles accessible to search engines and AI?

Is content in tiles accessible to screen readers?