docs: add internal shortcode formatting examples

[YASHMAHAKAL]

Notes for Reviewers
Adds the standard content-formatting-examples reference section, consistent with academy-example. This provides contributors with an internal-facing, locally-viewable cheat sheet of all available shortcodes across academy-theme, Docsy, Hextra, Hugo built-ins, and Markdown. Also enables markup.goldmark.renderer.unsafe in hugo.yaml to ensure all shortcodes render correctly.

This PR fixes : layer5io/academy-example#155

note: omitted "org-id" file

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2026-07-12 03:57 UTC

[Bhumikagarggg]

@YASHMAHAKAL Enabling unsafe globally causes the existing homepage blocks/lead shortcode to render as a primary-colored section, adding a green background behind “Welcome to dev environment for your Academy”. This visual change is unrelated to the content-formatting examples. Please either avoid enabling unsafe globally or adjust the homepage shortcode/content so this PR does not change the index page appearance.

[YASHMAHAKAL]

@YASHMAHAKAL Enabling unsafe globally causes the existing homepage blocks/lead shortcode to render as a primary-colored section, adding a green background behind “Welcome to dev environment for your Academy”. This visual change is unrelated to the content-formatting examples. Please either avoid enabling unsafe globally or adjust the homepage shortcode/content so this PR does not change the index page appearance.

This is page won't render in prod, goldmark needs to be enabled globally to make sure it will render shorcodes like cardpane and card and other html markdown.

I don't think we should remove that shortcode form index.md